Glass assembly, projection imaging system, vehicle, projection method, and control method

Abstract

A glass assembly, a projection imaging system, a vehicle, a projection method, and a control method. A projection area is formed on the glass assembly. Parameters of the glass assembly satisfy the following condition: [Expression 1], where t is the thickness of a refractive layer of the glass assembly, R is the radius of curvature of the projection area, n is the average refractive index of the refractive layer, and θ is the incident angle of projection light.

Description

Glass assembly, projection imaging system, vehicle, projection method and control method

[0001] The present application claims priority to Chinese patent application No. 202410544674.1 and No. 202420944787.6, filed on April 30, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of projection devices, in particular to a glass assembly, a projection imaging system, a vehicle, a projection method and a control method. BACKGROUND

[0003] For vehicles, projection display is generally considered as an upgrade function of the vehicle. The content of the projection display generally includes vehicle driving information, video content, etc. The projected image is usually displayed on the glass assembly of the vehicle. TECHNICAL PROBLEM

[0004] Since the current glass assembly needs to have high light transmittance, mirror reflection light will be generated on the inner and outer surfaces of the glass assembly during projection, thereby causing the image presented to have ghosting problems. TECHNICAL SOLUTION

[0005] The present application provides a glass assembly. The glass assembly is used for projection. A projection area is formed on the glass assembly. The parameters of the glass assembly satisfy the following conditions:

[0006] Wherein, t is the thickness of the refractive layer of the glass assembly, R is the radius of curvature of the projection area, n is the average refractive index of the refractive layer, and θ is the incident angle of the projection light.

[0007] The present application also provides a projection method. The projection method is applied to the glass assembly. A projection area is formed on the glass assembly. The method comprises:

[0008] The projection parameters of the glass assembly satisfy the following conditions:

[0009] Wherein, t is the thickness of the refractive layer of the glass assembly, R is the radius of curvature of the projection area, n is the average refractive index of the refractive layer, and θ is the incident angle of the projection light.

[0010] The present application also provides a projection imaging system. The projection imaging system comprises a projector and the aforementioned glass assembly. Wherein, the projector is used for emitting projection light to the glass assembly. The projection light is reflected by the glass assembly to form an image.

[0011] The present application also provides a vehicle. The vehicle comprises the aforementioned projection imaging system.

[0012] This application also provides a projection control method applied to the aforementioned vehicle's projection imaging system. The projection control method includes:

[0013] In response to a control signal, the projection imaging system is controlled to enter the entertainment viewing mode, which includes both the entertainment viewing mode and the driving mode.

[0014] In response to entering entertainment / movie viewing mode, the current ambient brightness is obtained;

[0015] Based on the current ambient brightness, the brightness of the light emitted by the projector is determined as the target brightness;

[0016] Control the projector to turn on and emit light at the target brightness. Beneficial effects

[0017] The glass assembly provided in this application satisfies the following conditions regarding the thickness t of the refractive layer, the radius of curvature R of the projected region, the average refractive index n of the refractive layer, and the incident angle θ of the projected light ray: This can reduce or even avoid the ghosting problem that exists in the reflection imaging projected onto the glass assembly. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the vehicle structure provided in some embodiments of this application;

[0019] Figure 2 is a structural block diagram of a projection imaging system provided in some embodiments of this application;

[0020] Figure 3 shows the relative positional relationship between the projector and the eye box in some embodiments of this application;

[0021] Figure 4 shows the relative positional relationship between the second projector and the eye box provided in some embodiments of this application;

[0022] Figure 5 shows the relative positional relationship between the third projector and the eye box provided in some embodiments of this application;

[0023] Figure 6 shows the relative positional relationship between the fourth projector and the eye box provided in some embodiments of this application;

[0024] Figure 7 shows the relative positional relationship between the fifth projector and the eye box provided in some embodiments of this application;

[0025] Figure 8 shows the relative positional relationship between the sixth projector and the eye box provided in some embodiments of this application;

[0026] Figure 9 shows the relative positional relationship between the seventh projector and the eye box provided in some embodiments of this application;

[0027] Figure 10 is a schematic diagram of the projection principle provided in some embodiments of this application;

[0028] FIG. 11 is a structural block diagram of a projector according to some embodiments of the present application;

[0029] FIG. 12 is a structural diagram of a glass assembly according to some embodiments of the present application;

[0030] FIG. 13 is a structural diagram of a glass assembly according to some other embodiments of the present application;

[0031] FIG. 14 is a flow diagram of a projection method according to some embodiments of the present application;

[0032] FIG. 15 is a flow diagram of a projection control method according to some embodiments of the present application. Embodiments of the present application

[0033] Please refer to FIG. 1 and FIG. 2, FIG. 1 is a structural diagram of a vehicle according to some embodiments of the present application; and FIG. 2 is a structural block diagram of a projection imaging system according to some embodiments of the present application.

[0034] As shown in FIG. 1 and FIG. 2, in some embodiments, a vehicle 100 includes a projection imaging system 1. The vehicle 100 includes, but is not limited to, a small car, a sports car, an SUV (Sport Utility Vehicle), an MPV (Multi-Purpose Vehicle), or a van, etc.

[0035] In some embodiments, as shown in FIG. 1 and FIG. 2, the projection imaging system 1 includes a projector 10 and a glass assembly 20. The projector 10 is configured to emit a projection light to the glass assembly 20, and the projection light is reflected by the glass assembly 20 to form an image.

[0036] It should be noted that the image formed by the reflection of the projection light by the glass assembly 20 is located on the side of the glass assembly 20 away from the projector 10.

[0037] It can be understood that the projection light includes, but is not limited to, polarized light, natural light, etc. used for projecting an image. In some embodiments, the projection light can be S-polarized light. In other embodiments, the projection light can also be other polarized light, such as P-polarized light, etc.

[0038] It should be noted that S-polarized light refers to light waves with electric field vectors parallel to the direction of propagation. P-polarized light refers to light waves with electric field vectors perpendicular to the direction of propagation. Since S-polarized light can reduce light scattering and reflection during projection, as well as reduce glare from the light source, it can improve the contrast of the projected image and provide a more comfortable viewing experience. Glare is a bright area caused by light scattering and reflection, and using S-polarized light can effectively reduce this glare effect.

[0039] It can be understood that the specular reflection imaging forms the image P (the image is marked as P in FIG. 1) by reflecting the light, and therefore, no additional color or distortion is introduced, and the color fidelity is high. Moreover, the specular reflection can accurately reflect the light, so that the brightness difference in the image is more obvious, and the details are clearer, thereby achieving a higher contrast. In addition, the image presented by the specular reflection imaging can be a 3D image, which is more stereoscopic.

[0040] It can be understood that the image formed by the reflection of the glass assembly 20 is a virtual image.

[0041] In some embodiments, the glass assembly 20 is arranged at the top of the vehicle 100, that is, the glass assembly 20 is a sunroof glass. In other embodiments, the glass assembly 20 can be arranged at a vehicle window, that is, the glass assembly 20 is a vehicle window glass.

[0042] Compared with the glass assembly 20 as a front windshield, the glass assembly 20 arranged at the top of the vehicle 100 as a sunroof glass or arranged at a vehicle window as a vehicle window glass has a lower requirement for light transmittance, and therefore, the reflectivity of light can be higher, thereby improving the brightness of the image. In addition, since the area of the top of the vehicle 100 is larger than the area of the vehicle window, the sunroof glass is used as the glass assembly 20 for projection, and the projected image P can be larger, which helps to improve the viewing effect.

[0043] In other embodiments, the projection imaging system 1 can also be arranged in a starry sky room or the like.

[0044] In some embodiments, as shown in FIG. 1, the projection light is reflected on the glass assembly 20 at the maximum incident angle θmax and the minimum incident angle θmin, respectively, to form an eyebox observable area, and the maximum length of the eyebox observable area in the driving direction A is k, and the value range of k is 0.2 m-0.6 m.

[0045] Therefore, the user's eyes have a larger movable area. In the movable area, the user can observe the complete image formed by the reflection of the glass assembly 20.

[0046] It should be noted that the eyebox observable area E refers to an area in which the user can see the entire image P when the eyes are located in the area.

[0047] It should be noted that the driving direction can be understood as a direction parallel to the line connecting the midpoint of the two front wheels and the midpoint of the two rear wheels of the vehicle 100.

[0048] Please refer to Figs. 1, 3-9, Fig. 3 is a relative position relationship between a first kind of projector and the observable area of the eyebox provided by some embodiments of the present application; Fig. 4 is a relative position relationship between a second kind of projector and the observable area of the eyebox provided by some embodiments of the present application; Fig. 5 is a relative position relationship between a third kind of projector and the observable area of the eyebox provided by some embodiments of the present application; Fig. 6 is a relative position relationship between a fourth kind of projector and the observable area of the eyebox provided by some embodiments of the present application; Fig. 7 is a relative position relationship between a fifth kind of projector and the observable area of the eyebox provided by some embodiments of the present application; Fig. 8 is a relative position relationship between a sixth kind of projector and the observable area of the eyebox provided by some embodiments of the present application; Fig. 9 is a relative position relationship between a seventh kind of projector and the observable area of the eyebox provided by some embodiments of the present application.

[0049] As shown in Figs. 1 and 3-9, in some embodiments, the projector 10 and the observable area of the eyebox are both located in the interior of the vehicle 100. The line connecting the projection of the projector 10 and the projection of the observable area of the eyebox on the chassis plane of the vehicle 100 is parallel to or intersects with the driving direction A. The projection of the projection area 101 on the chassis plane of the vehicle 100 is located between the projection of the projector 10 on the chassis plane of the vehicle 100 and the projection of the observable area of the eyebox on the chassis plane of the vehicle 100.

[0050] It should be noted that the driving direction A refers to the driving direction when driving in a straight line. The projection area 101 is the area where the light emitted by the reflection projector 10 is reflected. The projection area 101 can be square, circular or polygonal, etc.

[0051] As shown in Fig. 3, in some embodiments, the number of projectors 10 is two. The line connecting the projection of each projector 10 and the projection of the observable area of the eyebox on the chassis plane of the vehicle 100 intersects with the driving direction A, and in the driving direction A, the projector 10 is located in front of the observable area of the eyebox, which can facilitate the rear passengers in the vehicle 100 to watch the projected image.

[0052] As shown in Figs. 4 and 5, in some embodiments, the number of projectors 10 is one. The line connecting the projection of the projector 10 and the projection of the observable area of the eyebox on the chassis plane of the vehicle 100 intersects with the driving direction A, and in the driving direction A, the projector 10 is located in front of the observable area of the eyebox, which can facilitate the rear passengers in the vehicle 100 to watch the projected image.

[0053] As shown in FIG. 6, in some embodiments, the number of projectors 10 is one, the line connecting the projector 10 and the projection of the eyebox observable area E on the chassis plane of the vehicle 100 is parallel to the driving direction A, and in the driving direction A, the projector 10 is located in front of the eyebox observable area E. Specifically, the projector 10 and the eyebox observable area E are both located on the driver side, or the projector 10 and the eyebox observable area E are both located on the co-driver side, or the projector 10 and the eyebox observable area E are both located between the driver side and the co-driver side. At this time, it is convenient for the rear passengers in the vehicle 100 to view the projected image.

[0054] As shown in FIG. 7, in some embodiments, the number of projectors 10 is two. The line connecting each projector 10 and the projection of the eyebox observable area E on the chassis plane of the vehicle 100 is parallel to the driving direction A, and in the driving direction A, the projector 10 is located behind the eyebox observable area E. At this time, it is convenient for the front passengers and the driver in the vehicle 100 to view the projected image.

[0055] As shown in FIG. 8 and FIG. 9, in some embodiments, the number of projectors 10 is one. The line connecting the projector 10 and the projection of the eyebox observable area E on the chassis plane of the vehicle 100 is parallel to the driving direction A, and in the driving direction A, the projector 10 is located behind the eyebox observable area E. Specifically, as shown in FIG. 8, the projector 10 and the eyebox observable area E are both located on the co-driver side (left-hand drive vehicle), at this time, it is convenient for the front passengers to view the projected image. Alternatively, as shown in FIG. 9, the projector 10 and the eyebox observable area E are both located on the co-driver side (left-hand drive vehicle), at this time, it is convenient for the driver to view the projected image. It should be noted that the driver side and the co-driver side of the right-hand drive vehicle are opposite to the driver side and the co-driver side of the left-hand drive vehicle.

[0056] Please refer to FIG. 10, which is a structural schematic diagram of a glass assembly provided by some embodiments of the present application.

[0057] In some embodiments, as shown in FIG. 10, a refraction layer 21 is formed on the glass assembly 20. The first reflection surface 211 and the second reflection surface 212 are formed at intervals in the thickness direction H1 of the refraction layer 21. The projector 10 is arranged on the side close to the first reflection surface 211. As shown in FIG. 1, 2h*(tan θmax-tan θmin)≤k, wherein h is the vertical distance between the projector 10 and the first reflection surface 211, θmax is the maximum incident angle of the projection light on the first reflection surface 211, and θmin is the minimum incident angle of the projection light on the first reflection surface 211.

[0058] Since k is in the range of 0.2m-0.6m, the incident angle of the projection light on the first reflecting surface is in the range of 55°-85°, i.e. tanθmax=tan85° and tanθmin=tan55°, thus 2h*(tanθmax-tanθmin)≤k, h≤k / 20, i.e. h≤3cm, so that when the glass assembly 20 is a sunroof, the projector 10 is arranged relatively close to the sunroof, and the projector 10 can avoid blocking the horizontal view of the user and affecting the activities of the user.

[0059] Referring to FIG. 11, FIG. 11 is a structural block diagram of a projector according to some embodiments of the present application.

[0060] In some embodiments, the projector 10 comprises a light emitter 11 and a lens 12. The projection light emitted by the light emitter 11 is focused by the lens 12 and then emitted to the glass assembly 20. The lens 12 can rotate relative to the light emitter 11 to adjust the incident angle of the projection light on the glass assembly 20. The adjustment mode can be multi-position adjustment or stepless adjustment.

[0061] For example, the lens 12 can rotate independently to adjust the incident angle of the projection light on the glass assembly 20, compared to rotating the whole projector 10 to adjust the incident angle of the projection light on the glass assembly 20. Since the rotation of the whole projector 10 has more complex requirements for the installation of the projector 10, the structure that the lens 12 can rotate independently is more convenient for installing the projector 10 at the target position and more beautiful. The adjustment mode can be multi-position adjustment, which means that the projector 10 can adjust the direction of the projection light within a preset angle range, so that the user can select the most suitable projection angle according to the projection distance, the size of the projectable area of the glass assembly 20, the installation environment and other factors to obtain the best projection effect. The adjustment mode can be stepless adjustment, which can smoothly adjust the exit angle of the projection light.

[0062] In some embodiments, as shown in FIG. 2, the projection imaging system 1 further comprises a controller 30 and a sensor 40. The sensor 40 is used to collect the eye angle of the user. The controller 30 is used to determine the target incident angle of the projection light on the glass assembly 20 based on the eye angle of the user. In this way, the user can have a better viewing experience.

[0063] In some embodiments, the sensor 40 comprises but is not limited to an eye tracking sensor 40. The eye tracking sensor 40 comprises an infrared light source and an infrared camera. The infrared light source emits infrared light to irradiate on the eyeball, and the infrared camera captures the reflected infrared light and calculates the position of the eyeball to determine the eye angle of the user.

[0064] In some embodiments, the projection imaging system 1 comprises a driving mode and an entertainment viewing mode. In the driving mode, the projector 10 outputs driving information, and in the entertainment viewing mode, the projector 10 outputs video information.

[0065] In some embodiments, the driving information includes at least one of a vehicle speed, a rotation speed, a cruising range, a navigation route, and a tire pressure. The movie information includes various videos, images, and the like.

[0066] Compared with the related art of displaying driving information by a head-up display and displaying movie information by a vehicle-mounted entertainment device, the driving information and the movie information in the present application can be output by the projector 10 and reflected and projected by the glass assembly 20, so that multiple functions are concentrated by the same device.

[0067] In some embodiments, as shown in FIG. 12, the glass assembly 20 has a refractive layer 21, and the first reflection surface 211 and the second reflection surface 212 are formed at intervals in the thickness direction H1 of the refractive layer 21. The first reflection surface 211 is configured to reflect at least part of the projection light, and the second reflection surface 212 is configured to reflect at least part of the projection light refracted by the refractive layer 21. That is, the projection light first passes through the first reflection surface 211, part of the projection light is reflected to form an image P1, and the other part passes through the refractive layer 21 to be refracted and is reflected by the second reflection surface 212 to form an image P2. Since there is a certain offset distance between the reflected light after being reflected by the second reflection surface 212 and the reflected light after being reflected by the first reflection surface 211, a double image, i.e., ghosting, is generated, which is easy to cause dizziness.

[0068] To solve the above-mentioned ghosting problem, in some embodiments, as shown in FIG. 1 and FIG. 12, the glass assembly 20 has a projection area 101, and the parameters of the glass assembly 20 satisfy the following conditions:

[0069] Where t is the thickness of the refractive layer 21 of the glass assembly 20, R is the radius of curvature of the projection area 101, n is the average refractive index of the refractive layer 21, and θ is the incidence angle of the projection light.

[0070] In the present application, when the thickness t of the refractive layer 21 of the glass assembly 20, the radius of curvature R of the projection area 101, the average refractive index n of the refractive layer 21, and the incidence angle θ of the projection light satisfy: the offset between the reflected light of the first reflection surface 211 and the reflected light of the second reflection surface 212 can be reduced to an extent that cannot be perceived by the naked eye, and the ghosting problem in the projection and reflection imaging of the glass assembly 20 can be alleviated or even avoided.

[0071] In some embodiments, the first reflection surface 211 and the second reflection surface 212 are formed at intervals in the thickness direction H1 of the refractive layer 21, the first reflection surface 211 is configured to reflect at least part of the projection light, and the second reflection surface 212 is configured to reflect at least part of the projection light refracted by the refractive layer 21.

[0072] Therefore, part of the projection light is reflected on the first reflecting surface 211, and part of the projection light is refracted by the refractive layer 21 and then reflected on the second reflecting surface 212.

[0073] It should be noted that the first reflecting surface 211 and the second reflecting surface 212 can be located on the refractive layer 21 or not.

[0074] In some embodiments, the projection light forms a projection area 101 on the glass assembly 20, and the radius of curvature R of the projection area 101 is greater than or equal to 3000 mm.

[0075] Under the premise of satisfying , the radius of curvature R of the projection area 101 is greater than or equal to 3000 mm, which is beneficial to reduce or even avoid the ghosting problem of the reflection imaging of the projection light on the sunroof glass when the glass assembly 20 is the sunroof glass.

[0076] In some embodiments, the incident angle θ of the projection light on the first reflecting surface is between 55° and 85°.

[0077] When the incident angle is too small, the distance between the light emitted by the projector 10 and the light reflected by the glass assembly 20 is relatively small, which can reduce the reflectivity and affect the imaging effect. In addition, when the incident angle is too large, the space form of the vehicle has a higher requirement, so under the premise of satisfying , the incident angle θ of the projection light on the first reflecting surface is between 55° and 85°, which can ensure a high reflectivity and thus a good imaging effect, and has more universal applicability.

[0078] In some embodiments, the average refractive index n of the refractive layer is between 1.4 and 1.6.

[0079] Under the premise of satisfying , the average refractive index n of the refractive layer is between 1.4 and 1.6, which is beneficial to reduce or even avoid the ghosting problem of the reflection imaging of the projection light on the sunroof glass when the glass assembly 20 is the sunroof glass.

[0080] In some embodiments, as shown in FIG. 12, the glass assembly 20 includes a first glass 201, a first adhesive layer 202, and a second glass 203 which are sequentially stacked. The first glass 201, the first adhesive layer 202, and the second glass 203 form the refractive layer 21 as a whole. The outer surface of the first glass 201 close to the projection source is the first reflecting surface 211, and the inner surface of the second glass 203 away from the projection source is the second reflecting surface 212.

[0081] Therefore, for the glass assembly 20 including the first glass 201, the first adhesive layer 202, and the second glass 203 which are sequentially stacked, under the premise of satisfying Under the premise of this, the ghosting problem of the reflection image projected onto the glass assembly 20 can also be reduced or even avoided.

[0082] In some embodiments, the outer surface of the first glass 201 near the projection source is the first reflective surface 211. This means that the projected light is reflected by the outer surface of the first glass 201 near the projection source, so the outer surface of the first glass 201 near the projection source is the first reflective surface 211.

[0083] In some embodiments, the inner surface of the second glass 203 away from the projection source is the second reflective surface 212. This means that the projected light is refracted within the second glass 203 and reflected when it reaches the inner surface of the second glass away from the projection source; this inner surface is the second reflective surface 212. The outer surface of the second glass 203 away from the projection source is provided with a non-fully transparent light-shielding layer. This light-shielding layer can be a light-shielding film made of a light-shielding material or a sprayed light-shielding material. In this case, the outer surface of the second glass is not completely transparent, allowing the projected light to be reflected at the second reflective surface 212.

[0084] It should be noted that projection source 22 refers to a device that emits projection light. In some embodiments, projection source 22 may refer to projector 10.

[0085] In some embodiments, the material of the first adhesive layer 202 includes, but is not limited to, any one of PVB (polyvinyl butyral), EVA (ethylene-vinyl acetate copolymer), and PET (polyethylene terephthalate). PVB, EVA, and PET all possess good adhesive properties and transparency; therefore, when used to bond the first glass 201 and the second glass 203, they can achieve a more stable bond and allow the glass assembly 20 to have good light transmittance.

[0086] In some embodiments, the thickness of the refractive layer is between 2.9 and 5.8 mm.

[0087] The refractive layer 21 is a structure formed by the first glass 201, the first adhesive layer 202, and the second glass 203, which satisfies the following conditions: Under the premise that the thickness t of the refractive layer is between 2.9 and 5.8 mm, it is beneficial to reduce or even avoid the ghosting problem of the reflected image projected onto the glass assembly 20 when the glass assembly 20 is used as the skylight glass.

[0088] Please refer to Figure 13, which is a structural schematic diagram of a glass assembly provided in some other embodiments of this application.

[0089] In some embodiments, as shown in FIG. 13, the glass assembly 20 comprises the dimming film 204, the first adhesive layer 202 and the first glass 201 which are sequentially stacked. The first adhesive layer 202 and the first glass 201 form the refractive layer 21 as a whole. The outer surface of the first glass 201 facing the projection source 22 is the first reflecting surface 211. The inner surface of the dimming film 204 facing the projection source 22 is the second reflecting surface 212.

[0090] Therefore, for the glass assembly 20 comprising the dimming film 204, the first adhesive layer 202 and the first glass 201 which are sequentially stacked, the ghosting problem in the reflection imaging of the projection onto the glass assembly 20 can be alleviated or even avoided under the premise that

[0091] In some embodiments, the dimming film 204 is any one of a dichroic dye liquid crystal dimming film, an electrochromic dimming film, a polymer dispersed liquid crystal dimming film and a suspended particle dimming film. The preparation method of the dichroic dye liquid crystal dimming film, the electrochromic dimming film, the polymer dispersed liquid crystal dimming film and the suspended particle dimming film can be one or more of reduction method, physical vapor deposition (PVD) method, hydrolysis method (also known as liquid deposition method), sol-gel method, vacuum evaporation method, cathode sputtering method, electron beam deposition method and ion plating method.

[0092] In some embodiments, the thickness t of the refractive layer 21 is between 1.45 and 2.9 mm.

[0093] The structure of the refractive layer 21 formed by the first adhesive layer 202 and the first glass 201 is under the premise that the thickness of the refractive layer is between 1.45 and 2.9 mm, which is beneficial to alleviate or even avoid the ghosting problem in the reflection imaging of the projection onto the glass assembly 20 when the glass assembly 20 is used as a sunroof glass.

[0094] In some embodiments, as shown in FIG. 13, the dimming film 204 comprises the first dimming electrode 2041, the dimming layer 2042 and the second dimming electrode 2043 which are sequentially stacked. The first dimming electrode 2041 is located on the side of the dimming layer 2042 away from the projection source 22. The second dimming electrode 2043 is located on the side of the dimming layer 2042 close to the projection source 22.

[0095] In some embodiments, the first dimming electrode 2041 and the second dimming electrode 2043 are both light-transmitting electrodes. The first dimming electrode 2041 and the second dimming electrode 2043 are both thin films with conductive function of transparent conductive material attached to plastic substrates. The transparent conductive material can be ITO (indium tin oxide), and the plastic substrate can be PET (polyethylene terephthalate).

[0096] ​In some embodiments, the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043 are connected to a power supply, and by changing the current or voltage provided by the power supply to the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043, the light transmittance of the light-adjustable film 204 can be changed.

[0097] In some embodiments, the distance between the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043 is ≤0.2mm.

[0098] Since the refracted projection light through the refractive layer 21 is mostly reflected by the second light-adjustable electrode 2043, and a small part is reflected by the light-adjustable layer 2042 and the first light-adjustable electrode 2041, but the light is also refracted and reflected when it passes through the second light-adjustable electrode 2043, therefore the incident angle of the light on the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043 is different, resulting in different image positions of the reflected image, i.e. ghosting occurs, therefore, by making the distance between the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043 ≤0.2mm, i.e. within a small range, the change in the incident angle of the light on the light-adjustable layer 2042 and the second light-adjustable electrode 2043 can be avoided, which is beneficial to reducing ghosting.

[0099] In some embodiments, the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043 are symmetrically arranged about the light-adjustable layer 2042.

[0100] Since the electric field generated by the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043 together can adjust the internal structure arrangement of the light-adjustable layer 2042, and a single electrode cannot generate an electric field, therefore, by symmetrically arranging the first light-adjustable electrode 2041 and the second light-adjustable electrode 2043 about the light-adjustable layer 2042, the waste of resources caused by the inability of a single electrode to generate an electric field can be avoided.

[0101] In some embodiments, the second light-adjustable electrode 2043 has a second reflection surface 212 facing the projection source 22.

[0102] In some embodiments, the refractive layer 21 has a light transmittance of ≥80% for projection light.

[0103] Since the refractive layer 21 has a light transmittance of ≥80% for projection light, therefore most of the projection light through the refractive layer 21 will reach the second reflection surface 212 and be reflected there, and when the reflectivity of the second reflection surface 212 is high, the brightness of the reflected image can be higher.

[0104] The refractive layer 21 has a light transmittance of ≥90% for projection light, which can improve the brightness of the reflected image.

[0105] In some embodiments, the refractive layer 21 has a light transmittance of ≤30% for projection light.

[0106] Since the projection light first reflects off the first reflective surface 211 and a portion of the projection light is refracted by the refractive layer 21 and then reflects off the second reflective surface 212 when the projection light is projected onto the glass assembly 20, the transmittance of the projection light by the refractive layer 21 is ≤ 30%, and thus a smaller portion of the projection light that does not reflect off the first reflective surface 211 and enters the refractive layer 21 transmits through the refractive layer 21 to reflect off the second reflective surface 212. Thus, the second reflective surface 212 reflects a weak image that is almost invisible, and can be considered to reflect an image only through the first reflective surface 211, thereby reducing ghosting and the viewing dizziness caused by ghosting.

[0107] In some embodiments, the reflectance of the second reflective surface 212 to the projection light is ≥ 3.5%.

[0108] The second reflective surface 212 reflects a larger amount of the projection light, thereby enabling the image formed by the reflection of the glass assembly 20 to have a higher brightness.

[0109] In some embodiments, the reflectance of the second reflective surface 212 to the projection light is < 1%.

[0110] Since the projection light first reflects off the first reflective surface 211 and a portion of the projection light is refracted by the refractive layer 21 and then reflects off the second reflective surface 212 when the projection light is projected onto the glass assembly 20, the reflectance of the second reflective surface 212 to the projection light is < 1%, and thus a smaller portion of the projection light that does not reflect off the first reflective surface 211 and enters the refractive layer 21 transmits through the refractive layer 21 to reflect off the second reflective surface 212. Thus, the second reflective surface 212 reflects a weak image that is almost invisible, and can be considered to reflect an image only through the first reflective surface 211, thereby reducing ghosting and the viewing dizziness caused by ghosting.

[0111] In some embodiments, the ratio of the maximum value to the minimum value of the transmittance of the dimming film 204 to visible light is ≥ 6. Since the dimming film 204 can adjust the transmittance, the greater the ratio of the maximum value to the minimum value of the transmittance of the dimming film 204 to visible light, the greater the range of the transmittance adjustment of the dimming film 204, and the more the dimming film 204 can meet the needs of users for multiple different transmittances. The ratio of the maximum value to the minimum value of the transmittance of the dimming film 204 to visible light being ≥ 6 can meet the needs of users for the transmittance of the dimming film 204 in some general use scenarios.

[0112] The ratio of the maximum value to the minimum value of the transmittance of the dimming film 204 to visible light being ≥ 12 can meet the needs of users for the transmittance of the dimming film 204 in more diversified scenarios.

[0113] In some embodiments, the reflectivity of the dimming film 204 to the projection light is less than 1.5% in the brightest state.

[0114] Thus, when the projection is not performed, the light transmittance of the dimming film 204 to the visible light is large, and more ambient light can enter the vehicle, the starry room, etc. When the projection is performed, the reflectivity of the dimming film 204 to the projection light is less than 1.5% because the light transmittance of the dimming film 204 to the visible light is at the maximum value, and thus the reflectivity of the dimming film 204 to the projection light is small, and thus the ghosting problem can be reduced.

[0115] In some embodiments, the reflectivity of the second dimming electrode 2043 to the polarized light is less than 1%, and thus the polarized light emitted by the projector 10 can be reflected less by the second dimming electrode 2043, and the ghosting problem can be reduced.

[0116] FIG. 13 is a structural schematic diagram of a glass assembly according to some embodiments of the present application.

[0117] In some embodiments, as shown in FIG. 13, the glass assembly 20 includes the second glass 203, the second adhesive layer 205, the dimming film 204, the first adhesive layer 202, and the first glass 201 which are sequentially stacked. The first adhesive layer 202 and the first glass 201 form a refractive layer 21. The outer surface of the first glass 201 facing the projection source 22 is a first reflection surface 211, and the surface of the dimming film 204 facing the projection source 22 is a second reflection surface 212.

[0118] For the glass assembly 20 including the second glass 203, the second adhesive layer 205, the dimming film 204, the first adhesive layer 202, and the first glass 201 which are sequentially stacked, and the first adhesive layer 202 and the first glass 201 forming the refractive layer 21, because the light transmittance of the refractive layer 21 to the projection light is less than or equal to 30%, and / or the reflectivity n2 of the second reflection surface 212 to the projection light is less than 1%, the ghosting problem of the reflection imaging of the projection to the glass assembly 20 can be reduced or even avoided.

[0119] In some embodiments, the product of the visible light transmittances of the second glass 203, the second adhesive layer 205, the first adhesive layer 202, and the first glass 201 is greater than or equal to 10%. Thus, the ambient light can enter the vehicle 100, the starry room, etc. through the glass assembly 20.

[0120] FIG. 14 is a flowchart of a projection method according to some embodiments of the present application.

[0121] In some embodiments, the present application provides a projection method applied to the glass assembly 20. The glass assembly 20 has a projection area 101 formed thereon. As shown in FIG. 14, the method includes,

[0122] S1: the projection parameters of the glass assembly 20 satisfy the following conditions:

[0123] wherein: t is the thickness of the refractive layer 21 of the glass assembly 20, R is the radius of curvature of the projection area 101, n is the average refractive index of the refractive layer 21, and θ is the incident angle of the projection light.

[0124] By projecting the light onto the glass assembly 20 that satisfies the above conditions, the image ghosting can be reduced or even avoided.

[0125] Referring to FIG. 15, FIG. 15 is a flowchart of a projection control method provided by some embodiments of the present application.

[0126] It can be understood that the projection control method is not limited to the order of steps in FIG. 15, and can be increased, decreased or adjusted in order according to actual needs, which is not limited herein.

[0127] As shown in FIG. 15, in some embodiments, the projection control method is applied to the projection imaging system 1 provided by any one of the preceding embodiments, and the projection control method comprises the following steps.

[0128] S101: in response to a control signal, the projection imaging system 1 is controlled to enter an entertainment viewing mode, wherein the projection imaging system 1 comprises the entertainment viewing mode and a driving mode.

[0129] S102: in response to entering the entertainment viewing mode, the current ambient brightness is acquired.

[0130] S103: based on the current ambient brightness, the brightness of the light emitted by the projector 10 is determined as a target brightness.

[0131] S104: the projector 10 is controlled to be turned on and emit light with the target brightness.

[0132] In the present application, the projection imaging system 1 comprises the entertainment viewing mode and the driving mode. Compared with the related art, the driving information and the video information can be output by the projector 10, so that the functional integration is realized. In addition, after the projection imaging system 1 enters the entertainment viewing mode, the projector 10 is controlled to be turned on and emit light with the target brightness based on the current ambient brightness, so that the image brightness is more suitable, thereby improving the viewing experience.

[0133] In some embodiments, the projection imaging system 1 is turned off by default, and the opening is by default the driving mode.

[0134] Specifically, when the user does not select the entertainment viewing mode after the projection imaging system 1 is turned on, the driving information is automatically output after the projector 10 is turned on. The driving information comprises at least one of the vehicle speed, the rotation speed, the endurance, the navigation route and the tire pressure.

[0135] The projection imaging system 1 is off by default to save energy. Since driving mode is more energy-efficient than entertainment mode, turning the projection imaging system 1 on by default as driving mode can further conserve energy.

[0136] In other embodiments, the projection imaging system 1 is also turned on by default in entertainment viewing mode. In this case, the control signal is a signal triggered by the action of turning on the projection imaging system 1. The projection imaging system 1 can be manually turned on and off.

[0137] In some embodiments, determining the brightness of the light emitted by the projector 10 as the target brightness based on the current ambient brightness includes: when the current ambient brightness is less than a preset ambient brightness, determining the brightness of the light emitted by the projector 10 as a first preset brightness; when the current ambient brightness is greater than or equal to the preset ambient brightness, determining the brightness of the light emitted by the projector 10 as a second preset brightness, wherein the first preset brightness is less than the second preset brightness.

[0138] It is understandable that when the ambient brightness is high, the brightness of the light emitted by the projector 10 will be correspondingly higher, and when the ambient brightness is low, the brightness of the light emitted by the projector 10 will be correspondingly lower. On the one hand, this can improve the user's viewing experience, and on the other hand, it can help avoid wasting electricity.

[0139] It should be noted that the preset ambient brightness can be the boundary brightness between day and night. In other implementations, the preset ambient brightness can also be based on other determined brightness levels, and is not limited to the examples given in this article.

[0140] In some embodiments, the glass assembly 20 includes a bright state and a dark state. When the current ambient brightness is greater than or equal to a preset ambient brightness, the projection control method further includes controlling the glass assembly 20 to be in a dark state.

[0141] It should be noted that the reflectivity of the glass assembly 20 to the light emitted by the projector 10 is higher when the glass assembly 20 is in a dark state than when the glass assembly 20 is in a bright state.

[0142] It is understandable that when the current ambient brightness is greater than or equal to the preset ambient brightness, the control glass assembly 20 is in a dark state, which helps to improve the brightness of the image. This is beneficial for users to see the image better when the ambient brightness is high.

[0143] In some embodiments, controlling the state of the glass assembly 20 to be dark includes: obtaining the current state of the glass assembly 20; determining whether dimming needs to be activated based on the current state of the glass assembly 20, wherein dimming is by default adjusted from a bright state to a dark state; and controlling the glass assembly 20 to activate dimming when dimming needs to be activated.

[0144] Specifically, if the state of the glass assembly 20 is to be controlled to be dark, and the current state of the glass assembly 20 is dark, the dimming operation is not started; if the current state of the glass assembly 20 is bright, the dimming operation is started.

[0145] It should be noted that the dimming is actually to control the first dimming electrode 2041 and the second dimming electrode 2043 in the glass assembly 20 to be powered on, so that the first dimming electrode 2041 and the second dimming electrode 2043 generate corresponding electric fields, and then change the internal structure of the dimming layer 2042 in the glass assembly 20, so that the light transmittance thereof is weakened.

[0146] In some embodiments, after the projector 10 is controlled to be turned on and emit light of the target brightness, the projection control method further includes: controlling the dimming state of the glass assembly 20 to be a dimming lock state; wherein the dimming film 204 in the glass assembly 20 is inoperable in the dimming lock state.

[0147] Specifically, after the projection imaging system 1 enters the entertainment viewing mode and the glass assembly 20 is in the dark state, the first dimming electrode 2041 and the second dimming electrode 2043 in the dimming film 204 cannot be operated to be powered off, and the current of the first dimming electrode 2041 and the second dimming electrode 2043 cannot be operated.

[0148] In some embodiments, the projection control method further includes: in response to an exit signal, exiting the entertainment viewing mode; and controlling the dimming state of the glass assembly 20 to be a dimming unlock state, wherein the dimming film 204 in the glass assembly 20 is independently operable in the dimming unlock state.

[0149] Specifically, the first dimming electrode 2041 and the second dimming electrode 2043 in the dimming film 204 can be independently operated to be powered off when the projector 10 is in the start state, and the current of the first dimming electrode 2041 and the second dimming electrode 2043 can be operated.

[0150] In some embodiments, after exiting the entertainment viewing mode, the projection control method further includes: acquiring a current ambient brightness; when the current ambient brightness is less than a preset ambient brightness, controlling the projector 10 to switch to a driving mode; and when the current ambient brightness is greater than or equal to the preset ambient brightness, controlling the projector 10 to be turned off.

[0151] Since the projector 10 will still emit polarized light in the driving mode, but the brightness of the polarized light is usually less than that in the entertainment viewing mode, when the ambient brightness is relatively small (the current ambient brightness is less than the preset ambient brightness), controlling the projector 10 to switch to the driving mode can give the human eye a process of adapting to the change of brightness. Since the ambient brightness is relatively high (the current ambient brightness is greater than or equal to the preset ambient brightness), the human eye is already adapted to the relatively bright environment, and thus the projector 10 can be controlled to be turned off.

[0152] In some other embodiments, after exiting the entertainment viewing mode, the projection control method further includes: controlling the projector 10 to be turned off. That is, no matter what the ambient brightness is at this time, the projector 10 is directly turned off, which is more power saving.

[0153] In some embodiments, a computer readable storage medium stores computer instructions, and the computer instructions are used to execute the projection control method provided by any of the foregoing embodiments when called by a processor.

Claims

1. A glass assembly (20) for projection, a projection area (101) being formed on the glass assembly (20), parameters of the glass assembly (20) satisfying the following conditions: wherein t is the thickness of the refractive layer (21) of the glass assembly (20), R is the radius of curvature of the projection area (101), n is the average refractive index of the refractive layer (21), and θ is the incident angle of the projection light.

2. The glass assembly (20) of claim 1, wherein, The first reflection surface (211) is configured to reflect at least part of the projection light, and the second reflection surface (212) is configured to reflect at least part of the projection light refracted by the refractive layer (21).

3. The glass assembly (20) of claim 2, wherein, The projection light forms a projection area (101) on the glass assembly (20), and the radius of curvature of the projection area (101) is greater than or equal to 3000 mm.

4. The glass assembly (20) of claim 2 or 3, wherein, The incident angle of the projection light on the first reflection surface (211) is between 55° and 85°.

5. The glass assembly (20) of claim 2, wherein, The average refractive index of the refractive layer (21) is between 1.4 and 1.

6.

6. The glass assembly (20) according to any one of claims 1-5, wherein, The glass assembly (20) comprises a first glass (201), a first adhesive layer (202), and a second glass (203) stacked in sequence; the first glass (201), the first adhesive layer (202), and the second glass (203) form the refractive layer as a whole; the outer surface of the first glass (201) close to the projection source (22) is the first reflection surface (211), and the inner surface of the second glass (203) away from the projection source is the second reflection surface (212).

7. The glass assembly (20) of claim 6, wherein, The thickness of the refractive layer (21) is between 2.9 and 5.8 mm.

8. The glass assembly (20) according to any one of claims 1-7, wherein, The glass assembly (20) comprises a light-adjusting film (204), a first adhesive layer (202), and a first glass (201) stacked in sequence; the first adhesive layer (202) and the first glass (201) form the refractive layer as a whole; the outer surface of the first glass (201) close to the projection source is the first reflection surface (211), and the side of the light-adjusting film (204) facing the projection source (22) is the second reflection surface (212).

9. The glass assembly (20) of claim 8, wherein, The thickness of the refractive layer (21) is between 1.45 and 2.9 mm.

10. The glass assembly (20) of claim 8 or 9, wherein, The light-adjusting film (204) comprises a first light-adjusting electrode (2041), a light-adjusting layer (2042), and a second light-adjusting electrode (2043) stacked in sequence; the first light-adjusting electrode (2041) is located on the side of the light-adjusting layer (2042) away from the projection source (22), and the second light-adjusting electrode (2043) is located on the side of the light-adjusting layer (2042) close to the projection source (22).

11. The glass assembly (20) of claim 10, wherein, The distance between the first light-adjusting electrode (2041) and the second light-adjusting electrode (2043) is less than or equal to 0.2 mm.

12. The glass assembly (20) of claim 10 or 11, wherein, The side of the second light-adjusting electrode (2043) facing the projection source (22) is the second reflection surface (212).

13. The glass assembly (20) according to any one of claims 2-11, wherein, The light transmittance of the refractive layer (21) to the projection light is greater than or equal to 80%.

14. The glass assembly (20) according to any one of claims 2-11, wherein, The light transmittance of the refractive layer (21) to the projection light is less than or equal to 30%.

15. The glass assembly (20) according to any one of claims 2-11, wherein, The reflectivity of the second reflection surface (212) to the projection light is greater than or equal to 3.5%.

16. The glass assembly (20) according to any one of claims 2-11, wherein, The reflectivity of the second reflection surface (212) to the projection light is less than 1%.

17. The glass assembly (20) according to any one of claims 8-12, wherein, The ratio of the maximum value to the minimum value of the light transmittance of the dimming film (204) to visible light is ≥6.

18. The glass assembly (20) according to any one of claims 8-12, wherein, The reflectivity of the dimming film (204) to the projection light in the brightest state is <1.5%.

19. The glass assembly (20) according to any one of claims 10-12, wherein, When the light transmittance of the dimming film (204) to visible light is at the maximum value, the reflectivity of the second dimming electrode (2043) to the projection light is ≥4.5%.

20. A projection method applied to a glass assembly (20) having a projection area (101) formed thereon, the method comprising causing projection parameters of the glass assembly (20) to satisfy the following conditions: wherein: t is the thickness of the refractive layer (21) of the glass assembly (20), R is the radius of curvature of the projection area (101), n is the average refractive index of the refractive layer (21), and θ is the incident angle of the projection light.

21. A projection imaging system (1) comprising a projector (10) and a glass assembly (20) according to any one of claims 1-19, wherein, The projector (10) is used to emit projection light to the glass assembly (20), and the projection light is reflected by the glass assembly (20) to form an image.

22. The projection imaging system (1) according to claim 21, wherein The projection light is reflected on the glass assembly (20) at the maximum incident angle θmax and the minimum incident angle θmin to form an eyebox observable area (E), and the maximum length of the eyebox observable area (E) in the driving direction is k, and the value of k is in the range of 0.2m-0.6m.

23. The projection imaging system (1) according to claim 22, wherein The glass assembly (20) forms a refractive layer (21), and a first reflection surface (211) and a second reflection surface (212) are formed in the thickness direction of the refractive layer (21), and the projector (10) is arranged on the side close to the first reflection surface (211); wherein, 2h*(tanθmax-tanθmin)≤k, wherein h is the vertical distance between the projector (10) and the first reflection surface (211), θmax is the maximum incident angle of the projection light on the first reflection surface (211), and θmin is the minimum incident angle of the projection light on the first reflection surface (211).

24. The projection imaging system (1) according to any one of claims 21-23, wherein, The projector (10) includes a light emitter (11) and a lens (12), the projection light emitted by the light emitter (11) is focused by the lens and emitted to the glass assembly, and the lens (12) can rotate relative to the light emitter (11) to adjust the incident angle of the projection light on the glass assembly (20), wherein the adjustment mode is multi-position adjustment or stepless adjustment.

25. A vehicle (100) comprising the projection imaging system (1) according to any one of claims 21-24.

26. A projection control method applied to the projection imaging system (1) of the vehicle (100) of claim 25, the projection control method comprising: in response to a control signal, controlling the projection imaging system (1) to enter an entertainment viewing mode, wherein the projection imaging system (1) includes an entertainment viewing mode and a driving mode; in response to entering the entertainment viewing mode, acquiring a current ambient brightness; based on the current ambient brightness, determining the brightness of the light emitted by the projector to be a target brightness; controlling the projector (10) to turn on and emit light with the target brightness.

Images