Projection system, glass assembly and vehicle
By applying a combination of orthoprojection display layer and reflector on the window glass, the problem of difficulty in taking into account both image quality and observation field in the prior art is solved, high-quality image display and clear observation field are achieved, and safe driving and privacy protection are ensured.
Patent Information
- Application Number
- CN202410497400.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-05-06
AI Technical Summary
When using vehicle window glass for projection display, it is difficult to take into account the image quality and the driver's clear field of view of the vehicle's outside, especially the rear projection display technology, which has a contradiction between good image quality and low haze.
Using a combination of an orthoprojection display layer and a reflective member, the image projected by the projection device is reflected to the orthoprojection display layer, so as to realize the image display to the outside of the vehicle, while ensuring that the driver inside the vehicle can clearly observe the outside of the vehicle.
It achieves the ability to provide a clear viewing view of the driver inside the vehicle while ensuring image quality, ensure safe driving, and provide privacy protection, improving user experience.
Smart Images
Figure CN119937225A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure generally relates to the field of glass manufacturing technology, and in particular to a projection system using a glass component, a glass component suitable for the projection system, and a vehicle including the projection system or the glass component. Background Art
[0002] With the rapid development of the automobile industry, as a good medium for transmitting information to the interior and / or exterior of the vehicle, window glass has been widely valued by vehicle manufacturers and favored by consumers. Compared with using other locations in the vehicle for display (such as displays on the back of vehicle seats), window glass is more convenient, has a larger usable area, is more durable, and provides a better user experience.
[0003] Although projection to the outside of the vehicle through the window glass can meet the needs of some consumers, vehicle manufacturers and consumers expect that the projection display function on the window glass can provide a more diversified experience, such as realizing information interaction between the front and rear vehicles on the rear windshield. At the same time, they hope to adjust or improve the occasions and image quality of the projected image according to different needs, without affecting the observation needs from the inside of the vehicle to the outside of the vehicle. Summary of the invention
[0004] The purpose of the present disclosure is to solve the above-mentioned problems in the prior art and to propose a projection system using a glass component, which can provide image display functions for different application scenarios and user needs and ensure a clear observation field of view outside the vehicle, so as to obtain a more attractive product with both entertainment, comfort and safety in a cost-effective and reliable manner.
[0005] To this end, according to one aspect of the present disclosure, a projection system is provided, the projection system comprising: a glass assembly, the glass assembly comprising a glass body and a front projection display layer, the front projection display layer being attached to the glass body and being used to display an image to one side of the glass assembly; a projection device; and a reflector, the reflector being arranged on the image displaying side of the glass assembly, wherein the projection device and the reflector are respectively arranged on different sides of the glass assembly, or the projection device is embedded in the glass assembly, and the reflector is configured to reflect the image projected by the projection device to the front projection display layer.
[0006] According to the above technical concept, the embodiments of the present disclosure may further include any one or more of the following optional forms.
[0007] In some optional forms, the projection device and the reflector are respectively arranged on different sides of the glass component, including the projection device being attached to the surface of the glass component, or the projection device being separated from the glass component and arranged on the opposite side of the glass component where the image is displayed.
[0008] In some optional forms, the projection system includes a human-computer interaction unit configured to determine the image projected by the projection device.
[0009] In some optional forms, the human-computer interaction unit is communicatively connected to the projection device via an external interface and / or a wireless transceiver; optionally, the human-computer interaction unit includes at least one of a button module, a touch module, a gesture module, and a voice module.
[0010] In some optional forms, the projection system is a vehicle-mounted projection system, the projection device is arranged inside the vehicle, the reflective element is arranged outside the vehicle, and the orthographic projection display layer is configured to display images outside the vehicle.
[0011] In some optional forms, the glass component is a rear windshield of a vehicle, and the reflective member is arranged on a side of a rear spoiler or a trunk of the vehicle facing the rear windshield.
[0012] According to another aspect of the present disclosure, a glass assembly is provided, which is suitable for the above-mentioned projection system. The glass assembly includes a glass body and a positive projection display layer. The positive projection display layer is attached to the glass body and is used to display an image to one side of the glass assembly.
[0013] In some optional forms, the area on the glass component corresponding to the light path projected by the projection device is set to have a visible light transmittance greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%.
[0014] In some optional forms, the glass assembly further includes a light absorbing layer, and a visible light transmittance of the light absorbing layer in an area corresponding to the light path projected by the projection device is greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%.
[0015] In certain optional forms, the light absorbing layer includes a colored adhesive layer and / or a switchable layer, and the colored adhesive layer and / or the switchable layer are arranged on the opposite side of the glass component to the display image, wherein the area of the switchable layer corresponding to the light path projected by the projection device is configured to be switchable between a transparent state and an opaque state; optionally, the area of the switchable layer corresponding to the light path projected by the projection device and the remaining area of the switchable layer are divided into regions; and / or the light absorbing layer includes a colored printed border arranged adjacent to the edge of the glass component, and the colored printed border is arranged on the opposite side of the display image of the glass component or on one side of the display image of the glass component.
[0016] In certain optional forms, the visible light transmittance of the area of the colored adhesive layer and / or the colored printed border and / or the switchable layer corresponding to the light path projected by the projection device is greater than the visible light transmittance of the remaining areas of the colored adhesive layer and / or the colored printed border and / or the switchable layer; optionally, the difference between the visible light transmittance of the area and the visible light transmittance of the remaining areas is greater than or equal to 10%, greater than or equal to 20%, greater than or equal to 30%, greater than or equal to 40%, or greater than or equal to 50%.
[0017] In some optional forms, the switchable layer is configured as any one of a suspended particle film layer, an electrochromic film layer, a dye-doped polymer dispersed liquid crystal film layer, a guest-host liquid crystal film layer, and an electrophoretic film layer.
[0018] In certain optional forms, the glass assembly includes a picture frame structure arranged around the front projection display layer and / or the switchable layer.
[0019] In some optional forms, the projection system includes a control unit, which is configured to: obtain an instruction for the projection device to project an image, or determine that the projection device projects an image; enable the projection device to project an image; in response to the projection device projecting an image, make the area of the switchable layer corresponding to the light path projected by the projection device in a transparent state; optionally, the control unit includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer; or the glass assembly includes a control unit, which is configured to: obtain an instruction for the projection device to project an image, or determine that the projection device projects an image; enable the projection device to project an image; in response to the projection device projecting an image, make the area of the switchable layer corresponding to the light path projected by the projection device in a transparent state; optionally, the control unit includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer.
[0020] In some optional forms, the projection system includes a human-computer interaction unit, and the control unit of the projection system includes at least an electronic control unit of the human-computer interaction unit, and the electronic control unit of the human-computer interaction unit is configured to determine the image projected by the projection device; optionally, the control unit of the projection system also includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer; or the glass component includes a human-computer interaction unit, and the control unit of the glass component includes at least an electronic control unit of the human-computer interaction unit, and the electronic control unit of the human-computer interaction unit is configured to determine the image projected by the projection device; optionally, the control unit of the glass component also includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer.
[0021] In some optional forms, the human-computer interaction unit is communicatively connected to the glass component and / or the projection device via an external interface and / or a wireless transceiver; optionally, the human-computer interaction unit includes at least one of a button module, a touch module, a gesture module, and a voice module.
[0022] In certain optional forms, the haze of the orthographic projection display layer is less than 10%, preferably less than 6%, and further preferably less than 5%; optionally, the haze of the glass component is less than 10%, preferably less than 6%, and further preferably less than 5%.
[0023] In some optional forms, the glass body is a first glass body, the glass assembly also includes a second glass body, and the orthographic projection display layer is arranged on a surface of the first glass body away from the second glass body, or is arranged on a surface of the second glass body away from the first glass body, or is sandwiched between the first glass body and the second glass body.
[0024] According to another aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned projection system or glass assembly.
[0025] The projection system or glass assembly disclosed in the present invention realizes the image display function by providing an orthographic projection display layer, and combines with a reflector to reflect the image projected by the projection device to the orthographic projection display layer. When used in situations where images are displayed outside a vehicle, it can realize the interaction between the vehicle and other vehicles or people outside the vehicle according to different user needs under the premise of effectively protecting the projection device. In addition, due to the use of the orthographic projection display layer, it can provide the driver or passengers inside the vehicle with a clear observation view to the outside of the vehicle. At the same time, people outside the vehicle will not observe the interior of the vehicle, providing a privacy protection effect, and improving the user's usage atmosphere and experience comfort. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Other features and advantages of the present disclosure will be better understood through the following optional embodiments described in detail in conjunction with the accompanying drawings, in which:
[0027] Figure 1 is a schematic diagram of a projection system according to an embodiment of the present disclosure;
[0028] Figure 2 is a schematic cross-sectional view of a glass assembly according to an embodiment of the present disclosure, wherein an orthographic projection display layer is arranged on a surface of a first glass body away from a second glass body;
[0029] Figure 3 is a cross-sectional schematic diagram of a glass assembly according to another embodiment of the present disclosure, wherein an orthographic projection display layer is arranged between a first glass body and a second glass body;
[0030] Figure 4 is a cross-sectional schematic diagram of a glass assembly according to another embodiment of the present disclosure, showing a switchable layer and a forward projection display layer arranged between a first glass body and a second glass body, and a picture frame structure arranged around the forward projection display layer and the switchable layer;
[0031] Figure 5 is a schematic structural diagram of a vehicle-mounted projection system according to an embodiment of the present disclosure, showing a reflector arranged on a rear spoiler and a projection device embedded in a glass assembly;
[0032] Figure 6 It is a structural schematic diagram of a vehicle-mounted projection system according to another embodiment of the present disclosure, showing that the projection device is separated from the glass assembly and the projection device and the reflector are respectively arranged on different sides of the glass assembly. DETAILED DESCRIPTION
[0033] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary of specific ways to implement and use the present disclosure, and are not intended to limit the scope of the present disclosure. When describing the structural positions of the various components, such as up, down, top, bottom, etc., the expressions of directions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.
[0034] Herein, the expression "includes" or similar expressions "having" and the like are open-ended and do not exclude additional unrecited elements, steps or components.
[0035] Herein, the terms "first", "second", etc. are not used to limit the order of precedence and the number of components, unless otherwise specified.
[0036] In this document, unless otherwise specifically defined, the terms "attachment" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this document can be understood according to the specific circumstances.
[0037] As used herein, “plurality” means two or more than two, unless otherwise clearly and specifically defined.
[0038] Herein, the "surface" of a glass body or a laminated structure is defined by the plane where the length and width of the glass body or the laminated structure are located, and the "edge" is defined by the plane where the length or width and thickness of the glass body or the laminated structure are located. A "cross section" of a glass component is taken along the thickness direction of the glass component.
[0039] In this article, the glass assembly is described as being applied to the rear windshield of a vehicle, but it does not exclude that the glass assembly can be applied to the front windshield, door glass (including front door glass and rear door glass) or corner window glass. For these occasions, the arrangement position of the reflector can be adjusted accordingly, so that different image display effects can be provided based on different needs. In this article, "outside" and "inside" are directions relative to the vehicle body, "outside" refers to the direction away from the vehicle body, and "inside" refers to the direction facing the vehicle body.
[0040] In the various embodiments described, unless otherwise specified, the thickness of the glass is the thickness commonly used in the art, and the thickness of each laminated structure on the glass is applicable to the conventional range and is not limited to that shown in the figure. In addition, although the figure shows flat glass, the glass assembly of the present disclosure may also be curved glass. In various embodiments, it is described as an independent glass body, but in some cases not described, the surface of the glass body may also use a special coating to improve other properties such as heat insulation and / or comfort.
[0041] For manufacturers and vehicle users, it is hoped that the window glass can achieve richer and more diversified image display effects. For example, when the rear windshield is used to achieve image display effects, the image display can be used to achieve interaction between the front and rear vehicles (such as "thank you", "sorry", "baby in the car", etc.), display advertisements, provide camping cinemas, etc., so as to make the driving process safer, effectively avoid rear-end collisions, and provide a more comprehensive experience and comfort. It is more advantageous to use the window glass to display images while having low fog to meet the needs of the driver, especially the need to observe the field of view from the inside of the vehicle to the outside of the vehicle, to ensure safe driving.
[0042] At present, projection films are usually applied to the rear windshield of taxis, for example, to display advertising content such as pictures or videos to the outside of the vehicle. The projection film here is a rear projection display film. It should be understood that "front projection" refers to the light emitted by the projection device being projected onto the window glass to form an image, and then the light is reflected to the eyes of the observer, which is also called reflective projection. In contrast, "rear projection" refers to the light emitted by the projection device being projected from one side of the window glass, and the light passes through the window glass into the eyes of the observer on the other side, which is also called transmissive projection. Based on ergonomics, passengers inside the vehicle usually do not need a projection on the rear windshield toward the inside of the vehicle (for example, a front projection on the rear windshield), and the driver only observes the rear of the vehicle through the rearview mirror inside the vehicle through the rear windshield. Therefore, in the existing method, an image is usually projected onto the rear windshield by a projector inside the vehicle, scattered by the rear projection display film, and then displayed to the observer outside the vehicle.
[0043] Rear projection display film is based on the Mie scattering principle, and the scattering of incident light is mainly concentrated on the transmission side, which is particularly suitable for rear projection display. However, since Mie scattering has no selectivity for the wavelength of light, the inventors found that when the illumination from the projector (the luminous flux of visible light received per unit area) is similar, good image quality for observers outside the vehicle requires strong scattering ability on the transmission side (strong scattering ability for both light from the projector and the external environment), which requires the window glass to have high haze, resulting in the driver being unable to obtain a clear view of the rear of the vehicle. Therefore, the contradiction between good image quality and low haze is an inherent disadvantage of rear projection display technology. In order to compromise between image quality and haze, most rear projection display films on the market (such as Luxlab Clearbright film) have a haze between 10% and 30%, which will have a negative impact on safe driving because the driver cannot clearly observe the rear of the vehicle.
[0044] The display efficiency of a rear projection display film (that is, how much proportion of the luminous flux in the incident light can be used for projection display) can be qualitatively defined as "TL*haze", where TL refers to the transmittance of visible light. Table 1 shows an exemplary display efficiency analysis of several rear projection display films on the market. Herein, haze is the ratio of the scattered light flux of the incident light that deviates from the normal direction through the sample to the transmitted light flux, expressed in %. Usually, only the scattered light flux that deviates from the direction of the incident light by more than 2.5 degrees is used to calculate the haze, and a haze meter is used to measure according to standards GB2410 and ASTM D1003. The transmittance of visible light is the light transmission in the visible spectrum, expressed in %, and measured according to standard ISO 9050:2003 (light source D65; 2° observer).
[0045] Table 1: Rear projection display films
[0046]
[0047] The display efficiency of a front projection display film (i.e., the proportion of the incident light flux that can be used for projection display) can be qualitatively defined as "RL SCE", which refers to the diffuse reflectance measured by the SCE (Specular Component Exclude) measurement mode, expressed in %, which refers to the ratio of the total amount of diffuse reflected light to the total amount of incident light. Table 2 shows an exemplary analysis of the display efficiency of several front projection display films on the market.
[0048] Table 2: Orthographic projection display films
[0049]
[0050] By comparing Table 1 and Table 2, it can be seen that the front projection display film can produce a display efficiency comparable to that of the rear projection display film, but the haze is much lower. Therefore, when the front projection display film is applied to the window glass (e.g., the rear windshield) and displays images to the outside of the vehicle, it can provide good quality images to observers outside the vehicle, while ensuring that the inside of the vehicle, especially the driver, can clearly observe the outside of the vehicle, ensuring safe driving.
[0051] Based on the above analysis, the principle of the projection system disclosed in the present invention is as follows: Figure 1 As shown, the arrows in the figure indicate the approximate path of light transmission. The projection system includes a glass assembly 100. When applied to a vehicle-mounted projection system, the glass assembly 100 is applied to the rear windshield and includes a front projection display layer. The image projected by the projection device is transmitted from the outside of the vehicle toward the front projection display layer. For different vehicle models, the image projected by the projection device can be transmitted from the top of the outside of the vehicle (for example, the rear spoiler 300 located at the end of the rear windshield facing the top 200 of the vehicle) toward the front projection display layer, such as Figure 1 As shown, the image projected by the projection device can be transmitted from the bottom of the vehicle exterior (e.g., the trunk) toward the front projection display layer. Due to the low haze of the front projection display layer, the ambient light EL outside the vehicle can be transmitted to the interior of the vehicle almost unaffected and clearly observed by the observer E1 (e.g., the driver). At the same time, due to the diffuse reflection of the front projection display layer, the observer E2 outside the vehicle can observe a good quality image. Also due to the diffuse reflection of the front projection display layer, the observer E2 outside the vehicle cannot see the interior of the vehicle clearly, which also has the effect of protecting the privacy of the interior of the vehicle. In this article, the displayed image is not limited, for example, it can be static text, numbers, symbols or pictures, or it can be a dynamic video.
[0052] For the glass assembly 100, Figures 2 to 4Several different embodiments are exemplarily shown. It should be understood that the glass assembly of the present disclosure covers a single-layer glass body and a laminated glass having multiple layers of glass bodies. Figure 2 A glass assembly 100 of an embodiment is exemplarily shown, comprising a first glass body 110 and a second glass body 120, and an adhesive layer 130 for attaching the first glass body 110 and the second glass body 120 to each other. The orthogonal projection display layer 140 may be arranged on a surface of the first glass body 110 away from the second glass body 120, for example, through another adhesive layer 131, for displaying an image to one side of the glass assembly 100. When the orthogonal projection display layer 140 adopts a projection film with a backing adhesive, the other adhesive layer 131 may be regarded as being integrated with the orthogonal projection display layer 140.
[0053] Preferably, the haze of the selected front projection display layer 140 is lower than 10%, more preferably, lower than 6%, and further preferably, lower than 5%, the diffuse reflectance of visible light is greater than or equal to 10%, and the transmittance of visible light can be greater than or equal to 70%. For the front projection display layer using the holographic projection mode, its haze is also advantageously lower than 10%, more preferably, lower than 6%, and further preferably, lower than 5%, and the transmittance of visible light can also be greater than or equal to 70%. Optionally, the haze of the glass component with the front projection display layer is lower than 10%, preferably lower than 6%, and further preferably lower than 5%.
[0054] In different embodiments, the orthographic projection display layer 140 may be arranged on a surface of the second glass body 120 away from the first glass body 110, or sandwiched between the first glass body 110 and the second glass body 120. Here, "between" covers various arrangements in which the orthographic projection display layer 140 is directly adjacent to or not directly adjacent to the first glass body 110 or the second glass body 120, for example, Figure 2 The orthographic display layer 140 in the illustrated embodiment may also be disposed between the adhesive layer 130 and the first glass body 110 or the second glass body 120. Figure 3 In the glass assembly 100-1 of the illustrated embodiment, the adhesive layer 130 includes a first adhesive layer 130a attached to the first glass body 110 and a second adhesive layer 130b attached to the second glass body 120, and the front projection display layer 140 is arranged between the first adhesive layer 130a and the second adhesive layer 130b. Similarly, when the front projection display layer 140 adopts a projection film with a backing adhesive, any one of the first adhesive layer 130a and the second adhesive layer 130b can be regarded as being integral with the front projection display layer 140. In addition, when the front projection display layer 140 covers a portion of the first glass body 110 and the second glass body 120, for example Figure 3One of the first adhesive layer 130a and the second adhesive layer 130b attached to the front projection display layer 140 can be omitted, and the front projection display layer 140 is surrounded by the other of the first adhesive layer 130a and the second adhesive layer 130b. Depending on the arrangement position of the projection device, the front projection display layer 140 can obtain the effect of displaying images toward different sides of the glass component. For example, when Figure 2 When the glass assembly 100 is applied to a rear windshield, the first glass body 110 may face the outside of the vehicle (may be referred to as the outer glass), the second glass body 120 may face the inside of the vehicle (may be referred to as the inner glass), and the orthographic projection display layer 140 may be configured to display an image to the outside of the vehicle, specifically to face the rear windshield. Figure 2 The image is displayed above the indicated position.
[0055] Advantageously, the area on the glass component corresponding to the light path projected by the projection device is set to have a visible light transmittance greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%, thereby ensuring that the quality of the image projected by the projection device can be transmitted to the reflective element through the glass component without being affected.
[0056] In some embodiments, the glass assembly further includes a light absorbing layer, and the visible light transmittance of the light absorbing layer in the area corresponding to the light path projected by the projection device is greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%. Here, the "light absorbing layer" refers to the ability to absorb the light (at least for visible light) transmitted to the layer, thereby being able to improve the contrast of the image in certain situations, and play a role in enhancing the clarity of the image displayed on the positive projection display layer. When applied to, for example, the rear windshield and displaying the image to the outside of the vehicle, not only can people outside the vehicle observe the enhanced projected image, but also the interference of the image to people inside the vehicle can be reduced. It should be understood that for different application scenarios of the glass assembly, the degree of light absorption that can be achieved by the light absorbing layer varies greatly. Therefore, the visible light absorption rate of the light absorbing layer is not particularly limited in this article. For example, the light absorbing layer may include a colored print border arranged adjacent to the edge of the glass component, such as a black print border, in which case the visible light absorption rate of the colored print border is close to 100%; the light absorbing layer may also include a colored adhesive layer, in which case the visible light absorption rate of the colored adhesive layer may be greater than or equal to 10%, greater than or equal to 30%, greater than or equal to 50%, or greater than or equal to 70%; the light absorbing layer may also include a switchable layer, which can switch between a transparent state and an opaque state, wherein the "transparent state" means that when the switchable layer is switched to this state, the visible light transmittance may be greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, greater than or equal to 80%, or the maximum transmittance of the switchable layer, and the "opaque state" means that when the switchable layer is switched to this state, the visible light transmittance is less than the visible light transmittance in the transparent state, for example, the visible light transmittance is less than or equal to 50%, less than or equal to 40%, less than or equal to 30%, or less than or equal to 20%. For example, the visible light absorptivity of the switchable layer may be greater than or equal to 10%, greater than or equal to 30%, greater than or equal to 50%, or greater than or equal to 70%. "Absorbance" is also called absorption ratio, which refers to the percentage or proportion of the incident light absorbed by the medium when the light is projected onto the medium. The light absorptivity of the incident visible light by the medium can be measured using methods and equipment commonly used in the art. For example, a spectrophotometer can be used to measure the light absorptivity. For example, ISO9050 and ISO13837 can be used for determination.
[0057] Depending on the arrangement of the front projection display layer, the light absorbing layer may be arranged on the surface of the first glass body away from the second glass body, or on the surface of the second glass body away from the first glass body, or sandwiched between the first glass body and the second glass body.
[0058] In certain embodiments, when the glass assembly is, for example, a laminated glass, that is, when the glass assembly includes an adhesive layer that attaches a first glass body to a second glass body, a colored adhesive layer (e.g., an adhesive layer having a gray scale) may be used on the rear windshield for reasons such as privacy protection or limiting external light, so that the rear windshield is dark in color as a whole, but still allows the driver to observe the rear of the vehicle through the rear windshield. In this case, the colored adhesive layer may be used as a light absorbing layer and arranged on the opposite side of the display image of the front projection display layer, so that the clarity of the image displayed on the front projection display layer is enhanced by the colored adhesive layer. By adopting the method of colored adhesive layer, the visible light transmittance of the area of the colored adhesive layer corresponding to the light path projected by the projection device can be set to be greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%. That is, the colored adhesive layer can be set to be divided into different areas, and the area corresponding to the light path projected by the projection device is not colored so that the visible light transmittance meets the above requirements, while the remaining areas can still be kept colored, or according to different needs, the area corresponding to the light path projected by the projection device can also have different degrees (different depths) of coloring from the remaining areas for different visible light transmittance requirements. For example, compared with the remaining areas, the area corresponding to the light path projected by the projection device is lighter in coloring. Advantageously, the visible light transmittance of the area of the colored adhesive layer corresponding to the light path projected by the projection device is greater than the visible light transmittance of the remaining areas of the colored adhesive layer. Alternatively, the difference between the visible light transmittance of the area and the visible light transmittance of the remaining areas is greater than or equal to 10%, greater than or equal to 20%, greater than or equal to 30%, greater than or equal to 40%, or greater than or equal to 50%.
[0059] In some embodiments, the periphery of the adjacent edge of the rear windshield is usually provided with a colored printed border. Depending on different needs, the colored printed border can be arranged on the surface of the second glass body away from the first glass body, or can be arranged between the first glass body and the second glass body. For example, ink or enamel is used to form a black printed border on the surface of the first glass body facing the second glass body, which plays a role in shielding the circuit or isolating sunlight or ultraviolet rays. In this case, the colored printed border can be used as a light absorption layer, and the colored printed border can be arranged on the opposite side of the display image of the glass component or on the side of the display image of the glass component (for example, the surface of the first glass body facing the second glass body) according to different needs. The projection device is advantageously arranged in the area of the black printed border to shield the projection device. At this time, corresponding to the light path projected by the projection device, the corresponding area of the black printed border is set to have a visible light transmittance greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%, while the remaining area can still remain black. This can be achieved, for example, by not providing the corresponding area of the black printed border with materials such as ink or enamel to form the printed border. Advantageously, the visible light transmittance of the area of the colored printed edge corresponding to the light path projected by the projection device is greater than the visible light transmittance of the remaining area of the colored printed edge. Alternatively, the difference between the visible light transmittance of the area and the visible light transmittance of the remaining area is greater than or equal to 10%, greater than or equal to 20%, greater than or equal to 30%, greater than or equal to 40%, or greater than or equal to 50%.
[0060] In some embodiments, the light absorbing layer may be a switchable layer, wherein the area of the switchable layer corresponding to the light path projected by the projection device is set to be switchable between a transparent state and an opaque state, and the switchable layer may be arranged on the opposite side of the display image of the glass component, so as to enhance the clarity of the image displayed on the positive projection display layer. Alternatively, when switched to a transparent state, the visible light transmittance of the switchable layer may be greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, greater than or equal to 80%, or the maximum transmittance of the switchable layer; when switched to an opaque state, the visible light transmittance of the switchable layer is less than the visible light transmittance in the transparent state, which is not strictly limited here, for example, the visible light transmittance of the switchable layer in the opaque state may be less than or equal to 50%, less than or equal to 40%, less than or equal to 30%, or less than or equal to 20%. Depending on different needs, the switchable layer can be set to switch between a transparent state and an opaque state as a whole, or it can be set to be divided into different areas, that is, the area of the switchable layer corresponding to the light path projected by the projection device and the remaining area of the switchable layer are divided into regions, and the area corresponding to the light path projected by the projection device can be switched to a transparent state accordingly so that the visible light transmittance meets the above requirements, while the remaining area can still remain in an opaque state. Advantageously, the visible light transmittance of the area of the switchable layer corresponding to the light path projected by the projection device is greater than the visible light transmittance of the remaining area of the switchable layer. Alternatively, the difference between the visible light transmittance of the area and the visible light transmittance of the remaining area is greater than or equal to 10%, greater than or equal to 20%, greater than or equal to 30%, greater than or equal to 40%, or greater than or equal to 50%.
[0061] like Figure 4 In the glass assembly 100-2 of the embodiment shown in FIG. Figure 3 The embodiment shown is different in that a light absorbing layer 160, such as a switchable layer, is sandwiched between the first glass body 110 and the second glass body 120. Specifically, the light absorbing layer 160 is sandwiched between the first adhesive layer 130a and the second adhesive layer 130b, and is separated from the front projection display layer 140 by the third adhesive layer 130c. Similarly, one of the two adhesive layers adjacent to the front projection display layer 140 can be regarded as being integral with the front projection display layer 140. Similarly, one of the two adhesive layers adjacent to the front projection display layer 140 and / or the light absorbing layer 160 can be omitted, and the front projection display layer 140 and / or the light absorbing layer 160 can be surrounded by the other of the two adhesive layers, which will not be described in detail here.
[0062] When the light absorbing layer 160 is in the form of a switchable layer, the switchable layer can be configured as any one of a suspended particle (SPD) film layer, an electrochromic (EC) film layer, a dye-doped polymer dispersed liquid crystal (DDPDLC) film layer, a guest-host liquid crystal (GHLC) film layer, and an electrophoretic film layer.
[0063] The first adhesive layer 130a, the second adhesive layer 130b and the third adhesive layer 130c are adhesive layers suitable for laminated glass, such as polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), optically clear adhesive (OCA), etc. As an example, Figure 4 The second adhesive layer 130b in the embodiment may be a colored adhesive layer, and may be used together with the light absorbing layer 160 of the switchable layer as a light absorbing layer.
[0064] In some embodiments, the glass assembly may further include a picture frame structure arranged around the front projection display layer 140. For example, Figure 3 The picture frame structure 150 arranged around the front projection display layer 140 is exemplarily shown. The picture frame structure 150 can realize pre-positioning of the front projection display layer 140, fill the thickness difference between the edge of the front projection display layer 140 and the adhesive layer, and ensure complete sealing after lamination. Alternatively, the picture frame structure can be selected to be the same material as the adhesive layer. In the case where the thickness of the front projection display layer 140 is small enough, the picture frame structure can also be omitted.
[0065] Similarly, the glass assembly may also include a picture frame structure disposed around the light absorbing layer 160 . Figure 4 The picture frame structure 150 is exemplarily shown to be arranged around the front projection display layer 140 and the light absorption layer 160. Similarly, when the thickness of the front projection display layer 140 and / or the light absorption layer 160 is small enough, the picture frame structure 150 can also be omitted.
[0066] In some embodiments, the glass component may further include a functional layer such as a touch layer, which will not be described in detail herein.
[0067] Although based on Figure 1 According to the principle of the example, the projection device of the vehicle-mounted projection system can be arranged on the rear spoiler 300 to directly project an image onto the front projection display layer of the glass assembly 100. However, the present disclosure advantageously provides a reflector and arranges the reflector on the side of the glass assembly where the image is displayed, wherein the projection device and the reflector are arranged on different sides of the glass assembly, or the projection device is embedded in the glass assembly, and the reflector is configured to reflect the image projected by the projection device to the front projection display layer. In some embodiments, the projection device and the reflector are arranged on different sides of the glass assembly, including the projection device being attached to the surface of the glass assembly, or the projection device being separated from the glass assembly and arranged on the opposite side of the glass assembly where the image is displayed. In this way, the projection device is arranged inside the vehicle. Compared with the rear spoiler, the projection device can be arranged at a position with a larger spatial size, the installation is more stable and reliable, the power of the projection device can be larger to meet the requirements of higher image quality, and it is conducive to providing protection for the projection device (especially during the driving of the vehicle), thereby having the advantages of improving aging resistance and durability.
[0068] like Figure 5 In the illustrated embodiment, the projection device 400 can be embedded in the glass assembly 100 in the form of a rear windshield. The reflector 500 is arranged on the side of the rear spoiler 300 (or trunk) of the vehicle facing the rear windshield. The reflector 500 can be any component suitable for reflecting light, such as but not limited to a reflector, and the reflector can be set to a flat surface or a curved surface. When the reflector 500 is arranged on the rear spoiler 300, the rear spoiler 300 can cover and hide the reflector 500 to protect the reflector 500, while making the appearance of the vehicle beautiful.
[0069] Similarly, the projection device 400 can be attached to the surface of the glass component, for example, the projection device 400 can be bonded to the surface of the glass component facing the interior of the vehicle using an adhesive. When the projection device 400 is embedded in the glass component, the projection device 400 can be partially embedded in the corresponding opening (which can be a through hole or a non-through hole) on the glass component. Advantageously, the area on the glass component corresponding to the light path projected by the projection device is set to meet the above-mentioned visible light transmittance requirements (when the opening is a through hole, it can be considered that the visible light transmittance meets 100%), so that the glass component will not have an adverse effect on the transmission of light toward the reflector 500.
[0070] exist Figure 6 In the embodiment shown, Figure 5 The embodiment shown is different in that the projection device 400 is separated from the glass assembly 100 and arranged on the opposite side of the glass assembly 100 from the displayed image, for example, arranged on a vehicle component inside the vehicle. Similarly, the area on the glass assembly 100 corresponding to the light path projected by the projection device 400 is set to meet the above-mentioned visible light transmittance requirements, so as not to adversely affect the transmission of light toward the reflector 500.
[0071] Advantageously, the projection device 400 is configured as a short-throw projector, and its projection ratio (ratio of the distance between the projector and the screen to the screen size) is less than 1.0 to ensure the size of the projected image on the glass component 100. If the projection device 400 is embedded in the glass component or attached to the surface of the glass component, it is preferably configured as an ultra-short-throw projector, and its projection ratio is less than 0.4. Depending on different needs, the projection device may include one or more projectors, and the reflector may also be provided as one or more.
[0072] In certain embodiments where the light absorbing layer adopts a switchable layer, the projection system includes a control unit, and the control unit is configured to: obtain an instruction for the projection device to project an image, or determine that the projection device projects an image; cause the projection device to project an image; and in response to the projection device projecting an image, make the area of the switchable layer corresponding to the light path projected by the projection device in a transparent state. In certain embodiments, the control unit includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer. In certain optional embodiments, the glass assembly includes a control unit, and the control unit is configured to: obtain an instruction for the projection device to project an image, or determine that the projection device projects an image; cause the projection device to project an image; and in response to the projection device projecting an image, make the area of the switchable layer corresponding to the light path projected by the projection device in a transparent state. In certain embodiments, the control unit includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer.
[0073] In some embodiments, the projection system may include a human-machine interaction unit, and the control unit of the projection system includes at least an electronic control unit of the human-machine interaction unit, and the electronic control unit of the human-machine interaction unit is configured to determine the image projected by the projection device. In some embodiments, the control unit of the projection system also includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of a switchable layer. In some optional embodiments, the glass assembly may include a human-machine interaction unit, and the control unit of the glass assembly includes at least an electronic control unit of the human-machine interaction unit, and the electronic control unit of the human-machine interaction unit is configured to determine the image projected by the projection device. In some embodiments, the control unit of the glass assembly also includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of a switchable layer.
[0074] In some implementations, the human-machine interaction unit may be communicatively connected to the glass assembly and / or the projection device via an external interface and / or a wireless transceiver.
[0075] In some embodiments without the light absorbing layer, the projection system may also include a human-machine interaction unit configured to determine the projection image of the projection device. Alternatively, the human-machine interaction unit may be connected to the projection device through an external interface and / or a wireless transceiver.
[0076] When the human-computer interaction method is used in the vehicle projection system, the vehicle projection system can be integrated into a comprehensive control system in combination with the human-computer interaction unit, such as an automatic driving system (ADAS), thereby providing a richer and more diversified functional mode to enhance the driving experience of the driver and passengers. In some optional embodiments, the human-computer interaction unit may include at least one of a button module, a touch module, a gesture module, and a voice module. Alternatively, the glass component may have an adapted functional layer to achieve human-computer interaction, such as a touch layer. Of course, in some embodiments, in addition to the human-computer interaction method, the vehicle projection system may also be, for example, based on the vehicle's operating mode (such as starting, accelerating, constant speed, decelerating, turning, uphill and downhill, parking and other driving conditions), and correspondingly through, for example, a control unit (for example, a vehicle control unit, a remote control unit, an electronic control unit of a projection device, an electronic control unit of a switchable layer, and an electronic control unit of a human-computer interaction unit) to make the projection device project an image.
[0077] In some embodiments, for a light absorbing layer in the form of a switchable layer, the following control method may be used to control the projection system:
[0078] Obtaining instructions for the projection device to project an image or determining that the projection device projects an image;
[0079] causing the projection device to project an image;
[0080] In response to the projection of the image by the projection device, the area of the switchable layer of the glass component corresponding to the light path projected by the projection device is placed in a transparent state. Optionally, other areas of the switchable layer of the glass component except the area are placed in an opaque state.
[0081] In some embodiments, the control method further comprises: when the projection device stops projecting an image, switching the area of the switchable layer of the glass assembly corresponding to the light path projected by the projection device to an opaque state.
[0082] In some embodiments, a control unit of the projection system or glass assembly obtains an instruction for the projection device to project an image or determines that the projection device projects an image; causes the projection device to project an image; and in response to the projection device projecting the image, causes an area of the switchable layer corresponding to the light path projected by the projection device to be in a transparent state. The control unit of the projection system or glass assembly may include at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer.
[0083] In some embodiments, the control unit of the projection system or glass assembly includes at least an electronic control unit of a human-machine interaction unit, and the projection image of the projection device is determined by the electronic control unit of the human-machine interaction unit. The control unit of the projection system or glass assembly also includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of a switchable layer. The human-machine interaction unit can be, for example, connected to the glass assembly and / or the projection device for communication, but is not limited thereto, and can adopt any appropriate interaction method listed above or not described but can also be adopted.
[0084] Regardless of the arrangement and combination, the projection system or glass assembly of the present disclosure advantageously utilizes the orthographic projection display layer to provide an image display function. When applied to the occasion of displaying images to the outside of the vehicle, it can not only meet the demand of displaying images to people outside the vehicle, but also provide the driver or passengers inside the vehicle with a clear observation view to the outside of the vehicle due to the low haze of the orthographic projection display layer, especially ensuring safe driving for the driver. In addition, due to the diffuse reflection principle of the orthographic projection display layer, people outside the vehicle will not observe the interior of the vehicle, providing a privacy effect and bringing a rich and comfortable use experience to the user. It should be understood that in the possible implementation methods that have been described or not described, various improvement methods can be used independently or in combination with each other, so that the glass assembly and projection system of the present disclosure can be applied to a variety of occasions to meet the diverse needs of users.
[0085] It should be understood that the embodiments shown in the figures merely illustrate the optional architecture, shape, size and arrangement of the various optional components of the glass assembly and the projection system according to the present disclosure, but they are only illustrative and not restrictive, and other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present disclosure.
[0086] The technical content and technical features of the present disclosure have been disclosed above. However, it can be understood that under the creative ideas of the present disclosure, technicians in this field can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present disclosure. The description of the above implementation mode is illustrative rather than restrictive, and the protection scope of the present disclosure is determined by the claims.
Claims
1. A projection system, characterized in that: The projection system comprises: A glass assembly, the glass assembly comprising a glass body and an orthographic projection display layer, the orthographic projection display layer being attached to the glass body and used for displaying an image to one side of the glass assembly; projection equipment; and a reflector, the reflector being arranged on a side of the glass component where the image is displayed, The projection device and the reflector are arranged on different sides of the glass component, or the projection device is embedded in the glass component, and the reflector is configured to reflect the image projected by the projection device to the front projection display layer.
2. The projection system according to claim 1, characterized in that: The projection device and the reflection member are respectively arranged on different sides of the glass component, including the projection device being attached to the surface of the glass component, or the projection device being separated from the glass component and arranged on the opposite side of the glass component where the image is displayed.
3. The projection system according to claim 1 or 2, characterized in that: The projection system includes a human-computer interaction unit, and the human-computer interaction unit is configured to determine the image projected by the projection device.
4. The projection system according to claim 3, characterized in that: The human-computer interaction unit is communicatively connected with the projection device via an external interface and / or a wireless transceiver; optionally, the human-computer interaction unit includes at least one of a key module, a touch module, a gesture module, and a voice module.
5. The projection system according to any one of claims 1 to 4, characterized in that: The projection system is a vehicle-mounted projection system, the projection device is arranged inside the vehicle, the reflector is arranged outside the vehicle, and the orthographic projection display layer is configured to display images outside the vehicle.
6. The projection system according to claim 5, characterized in that: The glass assembly is a rear windshield of a vehicle, and the reflector is arranged on a side of a rear spoiler or a trunk of the vehicle facing the rear windshield.
7. A glass assembly, characterized in that: The glass component is suitable for the projection system according to any one of claims 1 to 6, and the glass component comprises a glass body and a positive projection display layer, wherein the positive projection display layer is attached to the glass body and is used to display an image to one side of the glass component.
8. The projection system according to any one of claims 1 to 6 or the glass assembly according to claim 7, characterized in that: The area on the glass component corresponding to the light path projected by the projection device is set to have a visible light transmittance greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%.
9. The projection system or glass assembly according to claim 8, characterized in that: The glass assembly further includes a light absorbing layer, wherein a visible light transmittance of a region of the light absorbing layer corresponding to a light path projected by the projection device is greater than or equal to 50%, greater than or equal to 60%, greater than or equal to 70%, or greater than or equal to 80%.
10. The projection system or glass assembly according to claim 9, characterized in that: The light absorbing layer comprises a colored adhesive layer and / or a switchable layer, and the colored adhesive layer and / or the switchable layer are arranged on the opposite side of the glass component where the image is displayed, wherein the area of the switchable layer corresponding to the light path projected by the projection device is configured to be switchable between a transparent state and an opaque state; optionally, the area of the switchable layer corresponding to the light path projected by the projection device and the remaining area of the switchable layer are divided into regions; and / or The light absorbing layer includes a colored border disposed adjacent to an edge of the glass component, the colored border being disposed on an opposite side of the glass component from the displayed image or on a side of the glass component from the displayed image.
11. The projection system or glass assembly according to claim 10, characterized in that: The visible light transmittance of the area of the colored adhesive layer and / or the colored printed edge and / or the switchable layer corresponding to the light path projected by the projection device is greater than the visible light transmittance of the remaining areas of the colored adhesive layer and / or the colored printed edge and / or the switchable layer; optionally, the difference between the visible light transmittance of the area and the visible light transmittance of the remaining areas is greater than or equal to 10%, greater than or equal to 20%, greater than or equal to 30%, greater than or equal to 40%, or greater than or equal to 50%.
12. The projection system or glass assembly according to claim 10 or 11, characterized in that: The switchable layer is configured as any one of a suspended particle film layer, an electrochromic film layer, a dye-doped polymer dispersed liquid crystal film layer, a guest-host liquid crystal film layer, and an electrophoretic film layer.
13. The projection system or glass assembly according to any one of claims 10 to 12, characterized in that: The glass assembly includes a picture frame structure arranged around the front projection display layer and / or the switchable layer.
14. The projection system or glass assembly according to any one of claims 10 to 13, characterized in that: The projection system includes a control unit, which is configured to: obtain an instruction for the projection device to project an image, or determine that the projection device projects an image; enable the projection device to project an image; in response to the projection device projecting an image, enable an area of the switchable layer corresponding to the light path projected by the projection device to be in a transparent state; optionally, the control unit includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer; or The glass assembly includes a control unit, which is configured to: obtain an instruction for the projection device to project an image, or determine that the projection device projects an image; enable the projection device to project an image; in response to the projection device projecting an image, enable the area of the switchable layer corresponding to the light path projected by the projection device to be in a transparent state; optionally, the control unit includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer.
15. The projection system or glass assembly according to claim 14, characterized in that: The projection system includes a human-machine interaction unit, and the control unit of the projection system includes at least an electronic control unit of the human-machine interaction unit, and the electronic control unit of the human-machine interaction unit is configured to determine the image projected by the projection device; optionally, the control unit of the projection system also includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer; or The glass component includes a human-computer interaction unit, and the control unit of the glass component at least includes an electronic control unit of the human-computer interaction unit, and the electronic control unit of the human-computer interaction unit is configured to determine the image projected by the projection device; optionally, the control unit of the glass component also includes at least one of a vehicle control unit, a remote control unit, an electronic control unit of the projection device, and an electronic control unit of the switchable layer.
16. The projection system or glass assembly according to claim 15, characterized in that: The human-computer interaction unit is communicatively connected with the glass component and / or the projection device via an external interface and / or a wireless transceiver; optionally, the human-computer interaction unit includes at least one of a key module, a touch module, a gesture module, and a voice module.
17. The projection system or glass assembly according to any one of claims 1 to 16, characterized in that: The haze of the orthographic projection display layer is lower than 10%, preferably lower than 6%, and more preferably lower than 5%; optionally, the haze of the glass component is lower than 10%, preferably lower than 6%, and more preferably lower than 5%.
18. The projection system or glass assembly according to any one of claims 1 to 16, characterized in that: The glass body is a first glass body, the glass assembly also includes a second glass body, and the orthographic projection display layer is arranged on a surface of the first glass body away from the second glass body, or is arranged on a surface of the second glass body away from the first glass body, or is sandwiched between the first glass body and the second glass body.
19. A vehicle, characterized in that: The vehicle comprises a projection system or a glass assembly according to any one of claims 1 to 18.