CN117321475A - Head-up display system for vehicle glazing - Google Patents
Head-up display system for vehicle glazing Download PDFInfo
- Publication number
- CN117321475A CN117321475A CN202380009307.5A CN202380009307A CN117321475A CN 117321475 A CN117321475 A CN 117321475A CN 202380009307 A CN202380009307 A CN 202380009307A CN 117321475 A CN117321475 A CN 117321475A
- Authority
- CN
- China
- Prior art keywords
- image display
- display device
- vehicle
- reflective layer
- display system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Classifications
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- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
- G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
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- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Instrument Panels (AREA)
Abstract
The invention relates to a head-up display system (100) for a vehicle glazing (1) comprising an outer side (I) facing an external environment (13) and an inner side (IV) facing a vehicle interior space in the mounted state, comprising: -at least one transparent glass pane (2, 3), -at least one masking strip (5) in an edge region (11) of the glass pane (2, 3), -at least one reflective layer (9) applied, in particular in a printing method, for reflecting light, which is arranged on the vehicle interior space side of the masking strip in the region of the masking strip (5), -at least one image display device (8) assigned to the reflective layer (9), which has an image display aligned with the reflective layer (9), the projected image (14) of which is reflected by the reflective layer (9) into the vehicle interior space (12), wherein the image display device (8) is curved in the horizontal direction in a top view.
Description
Technical Field
The invention relates to a head-up display system, in particular a black-print display system (Black Print Display), for a vehicle glazing, having at least one image display device, to a method for the production thereof, and to the use thereof, as well as to a head-up display system for a vehicle glazing and to a vehicle equipped therewith.
Background
Vehicles, in particular passenger cars (PKW), are increasingly equipped with so-called heads-up display systems or heads-Up Display Systems (HUDs), such as are known, for example, from DE102009020824 A1. The heads-up display system is arranged to display image information for a viewer or driver. By means of a projector as an imager, for example in the dashboard area or in the roof area, the image is projected onto the windscreen, reflected there and perceived by the driver as a virtual image behind the windscreen. Thus, important information, such as the current driving speed, navigation prompts or warning prompts, can be projected into the driver's field of view, which the driver can perceive without having to take his line of sight away from the lane. Therefore, the head-up display system is very helpful for improving traffic safety.
Typically, vehicle windshields comprise two glass sheets laminated to each other by at least one thermoplastic film. In the above head-up display system, there is a problem in that projector images are reflected on both surfaces of a windshield. Thus, the driver perceives not only the desired main image, which is caused by reflection (main reflection) on the surface on the inner space side of the windshield. The driver also perceives a slightly offset, usually weaker-intensity secondary image, which is caused by reflection (secondary reflection) on the outside surface of the windshield. This problem is generally solved by arranging the reflecting surfaces at a purposefully chosen angle to each other such that the primary image and the secondary image are superimposed such that the secondary image is no longer obtrusively noticeable.
Vehicle glazing panels, particularly windshields, typically include an opaque masking region with an opaque layer in addition to the transparent see-through region, which is not see-through. The masking region is usually arranged in the surrounding edge region of the windshield and encloses the see-through region. The opaque masking region is used primarily to protect the adhesive used to bond the windshield to the vehicle body from Ultraviolet (UV) radiation. If the composite glass pane is equipped with an electrical function (e.g. a heating function), the electrical terminals required for this can also be masked by means of masking regions. The masking region is typically formed by a black overlay print on the surface of the outer glass sheet facing the interlayer.
It is also known to provide vehicle glazing panels with a transparent, electrically conductive coating. These coatings may be used, for example, as infrared reflective coatings to reduce heating of the vehicle interior space and thereby improve thermal comfort, or as heatable coatings by connecting them to a power source such that current flows through the coating. Windshields having a conductive coating inside the composite glass sheet have problems associated with heads-up display systems in that another reflective interface for the projector image is formed by the conductive coating. This also results in undesirable secondary images.
In addition, it must be ensured that the projector has a correspondingly high power when designing the heads-up display system, so that the projected image has sufficient brightness and can be recognized well by the observer, in particular when sunlight is incident. This requires a certain projector size and is accompanied by a corresponding current consumption.
The current demand may be reduced, for example, by increasing the contrast of the reflected image. Thus, in principle, virtual images can also be generated in the masking region according to the same principle as the HUD. Thus, the mask area is also illuminated with the projector and light is reflected there, producing a display for the driver. Thus, for example, information displayed in the dashboard area up to now, such as time, speed of travel, engine speed or a description of the navigation system, or alternatively, instead of a conventional exterior mirror or a rearward-oriented camera of a rear-view mirror, an image can be displayed in a practical and attractive manner directly on the windscreen, for example in a section of the screening area adjoining the lower edge of the windscreen. Such a projection device is known, for example, from DE102009020824 A1.
Generally, a rectangular flat image display device is used to illuminate a display area in a projection device. This has the disadvantage that the contour of the projected image does not coincide with the reflective layer of the vehicle glazing, since the reflective layer is mostly curved in the horizontal and vertical directions. This results in a locally changing projection image which appears inconsistent and uneven to the viewer. For this reason, image cropping and/or image morphing is required at the upper or lower edge of the displayed image, depending on the design of the system. This in turn results in a reduction of the projected image. The reduction of the image can be compensated by means of an increased image display device with higher current consumption. But thereby increases material and energy costs and increases space requirements of the image display device.
A disadvantage of providing a rectangular display element in the dashboard is that the outline of the projected image does not coincide with the black printed surface of the windscreen, as the black printed surface is typically curved in horizontal and vertical directions. Therefore, depending on the design of the system, image cropping and/or image morphing may need to be performed at the upper or lower edges of the displayed image.
Another disadvantage arises from the transition of the plurality of display elements. If rectangular display elements are combined and arranged side by side so as to enlarge the projected image displayed in the black print area from pillar to pillar, voids inevitably occur between these display elements, although these voids may be reduced.
An additional disadvantage of the known heads-up display system is that it is not equally visible to the driver and co-driver.
WO2012080806A2 discloses a light source device for a vehicle.
DE102018212046A1 describes a method for providing a display in a motor vehicle and a display device for a motor vehicle.
EP2095988A1 discloses a head-up display system with high visibility.
WO2021209201A1 describes a projection device with p-polarized radiation for a head-up display system.
Disclosure of Invention
The object on which the invention is based is to provide a head-up display system with at least one image display device, which eliminates the known disadvantages of image inconsistencies.
According to the proposal of the invention, the object and the further objects are achieved by a vehicle glazing according to the preamble of the independent claims and a head-up display system having such a vehicle glazing and a correspondingly equipped vehicle. Advantageous embodiments of the invention emerge from the dependent claims.
According to the invention, this object is achieved in particular by a head-up display system for a vehicle glazing which, in the installed state, has an outside facing the external environment and an inside facing the vehicle interior, and which furthermore comprises:
at least one transparent glass sheet, which is transparent,
at least one masking strip in the edge region of the glass pane,
at least one reflective layer for reflecting light, in particular applied in a printing process, which is arranged on the vehicle interior space side of the masking strip in the region of the masking strip,
at least one image display device assigned to the reflective layer, having an image display aligned to the reflective layer, the projection image of the image display being reflected by the reflective layer into the vehicle interior,
Wherein the image display device is curved in a horizontal direction in a plan view.
Furthermore, the head-up display system according to the present invention has the following advantages: it offers a greater possibility for large, seamless user interfaces displayed on a black printed display system from column to column. Thus, there is a greater likelihood for projected images, particularly for distance and viewing angle. The view of the user interface is related to the driver or co-driver seat. There is no or at least less disturbing visual air gap between the display elements. Less hardware is required. The number of display control circuit boards can be reduced. The power consumption of the display is smaller because the display surface can be utilized more efficiently.
In the head-up display system according to the invention, the curvature of the image display device is adapted to the vehicle glazing geometry. That is, the display curvature should correspond as precisely as possible to the horizontal curvature of the vehicle glass pane in the black print region.
A preferred embodiment of the present invention is a head-up display system in which an image from a horizontally curved image display device is reflected by a reflective layer into a vehicle interior space. Thereby achieving a better viewing angle and better ergonomics. A straight and uniform upper edge of the projected image is achieved, while the lower edge of the projected image is flattened by image deformation. The curvature of the display device is adapted to the vehicle glazing geometry. The display curvature should correspond as precisely as possible to the horizontal curvature of the windshield in the black printed area. The image display device is therefore preferably curved in such a way that the display edges farther from the vehicle pane have the same radius of curvature at the edges of the projected image. The change in curvature of the display provides additional possibilities for projected images, such as virtual image spacing or viewing angle.
A preferred embodiment of the present invention is a head-up display system in which the horizontally curved image display device includes 1 to 10, preferably 2 to 8, particularly preferably 3 to 6 image display devices. This range of numbers of image display devices has proven to be particularly advantageous. The gaps between the projection images of the image display device can be used, for example, to separate the driver side and the passenger side and the common central display, which enables more flexibility in display selection and integration.
A preferred embodiment of the invention is a head-up display system in which the image display devices are arranged in a horizontal bend of the vehicle glazing panel in sequence and side by side such that the distances of the individual image display devices to the inside of the vehicle glazing panel are substantially identical. The image display device is disposed horizontally with respect to a surface normal of the vehicle floor. These image display devices are arranged side by side in a flat configuration. The image display device is arranged arcuately in a horizontal plane. The image display device projects an image onto different areas of the reflective layer of the vehicle glazing panel, respectively.
The heads-up display system or black print display system according to the present invention enables it to be seen equally by the driver and co-driver. The head-up display system according to the invention is integrated on the lower plane of the screen and enables all vehicle occupants to see it. The heads-up display system has limited or no image distortion. Only a limited number of displays are required. Space utilization in the dashboard area is optimized. The full function of the image display device is achieved and interference with other vehicle systems in an overcrowded area of the dashboard is avoided.
A preferred embodiment of the present invention is a heads-up display system in which image display devices are disposed at an angle between an image display surface of a corresponding image display device and a reflective layer. The angle is chosen such that the projected image is as parallel as possible to the viewing plane of the observer. The angle at which the image display device is disposed is selected according to the local bending of the vehicle glass sheet and the inclination of the vehicle glass sheet with respect to the vehicle floor. The angle of each image display device with respect to the reflective layer may be different. The angle is preferably in the range of 30 ° to 90 °.
A preferred embodiment of the invention is a head-up display system in which the image display device has no surrounding edge region. The occurrence of voids can be further reduced if the edge regions of the image display device which are not suitable for emitting light are usually configured with as small a width as possible. It is particularly preferred that the image display device has no surrounding edge area.
A preferred embodiment of the present invention is a head-up display system in which the image display device is curved corresponding to a horizontal curvature of a vehicle glass plate in an area irradiated with a projection image. Based on the image display device adapted to the bending of the vehicle glass pane, there is a greater degree of freedom in design in terms of the generated image. The projected image may be visually perceived from more viewing directions and angles. Interference gaps between the projection images that would occur in the case of a plurality of smaller image display devices can be avoided.
A preferred embodiment of the invention is a heads-up display system wherein the image display device emits an amount of light of at least 50 lumen, preferably at least 200 lumen, particularly preferably at least 600 lumen. The light quantity range is very advantageous.
The head-up display system according to the present invention includes a vehicle glazing panel for separating a vehicle interior space from a vehicle exterior environment. The vehicle glazing comprises at least one transparent glazing. The vehicle glazing may in principle be of any desired design, in particular as a thermally prestressed single-layer safety glazing or as a composite glazing. Preferably, the vehicle glazing is used as a vehicle windscreen.
The head-up display system according to the invention comprises a vehicle glass pane, in particular a vehicle windshield, which is configured as a composite glass pane and comprises a first glass pane having an outer side and an inner side and a second glass pane having an inner side and an outer side, which are fixedly connected to one another by means of at least one thermoplastic interlayer (adhesive layer). The first glass sheet may also be referred to as an outer glass sheet and the second glass sheet as an inner glass sheet. The surfaces or sides of two individual glass sheets are generally referred to as the I-, II-, III-and IV-th sides from the outside to the inside.
The head-up display system according to the invention comprises a vehicle glazing having an outside towards the external environment and an inside towards the vehicle interior space in the mounted state in the vehicle. In the vehicle glass plate configured as a composite glass plate, the outer side of the first glass plate is the outer side of the vehicle glass plate and the inner side of the second glass plate is the inner side of the vehicle glass plate.
The head-up display system according to the invention comprises a vehicle glazing having at least one masking strip in an edge region generally adjoining the glazing edge of the glazing. The at least one masking strip is a coating comprising one or more layers and is used to mask a structure that is otherwise visible through the glass sheet in the installed state. In particular in windshields, masking strips are used to mask the adhesive tape used to adhere the windshield to the vehicle body, i.e. to prevent the adhesive tape, which is normally irregularly applied, from being seen outwards, thus creating a harmonious overall impression of the windshield. On the other hand, the masking strip serves as a UV protection for the adhesive material used. Continued UV irradiation can damage the adhesive material and over time can separate the attachment of the glass sheet to the vehicle body.
The head-up display system according to the invention comprises a vehicle glazing having at least one masking strip which is configured in a frame-shaped manner around and in particular has a greater width in the region overlapping the reflective layer than in the remaining regions.
The at least one masking strip comprises a colored, preferably black, material that can preferably be baked into the glass panel. Preferably, the at least one masking strip is opaque, in order to be used, inter alia, as a line of sight and UV protection for, for example, adhesive tapes. In the case of glass panes with electrically controllable functional layers, masking strips can also be used, for example, to cover the bus conductors and/or the connecting elements.
In the sense of the present invention, "transparent" means that the total transmittance of the vehicle glazing complies with the legal requirements for windshields and preferably has a transmittance of more than 70% and in particular more than 75%, such as more than 95%, for visible light. Accordingly, "opaque" means that the light transmission is less than 30%, especially less than 25%, such as less than 5%, especially 0%.
The head-up display system according to the invention comprises a vehicle glazing which further comprises at least one reflective layer for reflecting light into the vehicle interior. It is important here that the reflective layer is arranged on the vehicle interior space side of the masking strip in the region of the masking strip. Thus, in a line of sight to the inside of the vehicle glazing, the reflective layer is positioned in front of the masking strip.
The term "in the region of the masking strip" means that the reflective layer is disposed overlapping the masking strip in a vertical line of sight through the vehicle glazing panel or in an orthogonal projection through the glazing. The reflective layer and the at least one masking strip may be disposed on different sides of the vehicle glazing panel or on the same side of the vehicle glazing panel. The reflective layer has no sections which do not overlap the masking strip, i.e. the reflective layer is only formed in a position in which it is located in front of the masking strip in the line of sight to the inside of the vehicle glazing.
The term "light is reflected into the vehicle interior space" relates to the state of installation of the vehicle glazing in the vehicle. The reflected light leaves the vehicle glazing on the inside of the vehicle glazing.
In the installed state of the vehicle glass pane in the vehicle, at least one reflective layer is assigned at least one image display device arranged in the vehicle interior. The image display device includes an image display whose image is projected onto the reflective layer and reflected by the reflective layer into the vehicle interior space. The image display device may also be referred to as a display and is configured as a TFT display, an LED display, an OLED display, an EL display, a μled display, or the like, preferably as a TFT display. Preferably, at least one image display device is assigned to the reflective layer. Particularly preferably exactly one image display device is assigned to the reflective layer. In the usual dimensions of image displays, the projected image may extend over substantially the entire width of the vehicle glazing panel when multiple image display devices are used. An improved user experience is thereby achieved for the passengers and the driver. In the case of only one image display device, no gap is generated between the projected images, which improves the user experience.
The image display device should preferably have a screen diagonal of 15cm to 30cm, particularly preferably 20cm to 25 cm. The larger image display device has the following advantages: a smaller number of image display devices need to be used so that less visible gaps occur between the projected projection images. Alternatively, the image display device preferably has a screen diagonal of 5cm to 15cm, particularly preferably 7cm to 12 cm. In smaller image display devices, the image needs to be pre-deformed less than in larger image display devices. I.e. the smaller image display device has less deviation from the horizontal radius of curvature of the vehicle glazing.
The thickness of the image display device is preferably 0.1cm to 5cm, particularly preferably 0.3cm to 1cm. At these dimensions, the image display device can be well installed in the dashboard of the vehicle without being easily seen by the driver or passenger.
The amount of light emitted by the image display device is at least 50 lumens, preferably at least 200 lumens, more preferably at least 600 lumens. The brightness of the light reflected by the reflective layer of the image display device is at least 500cd/m 2 Preferably at least 800cd/m 2 Particularly preferably 1000cd/m 2 . At this brightness, the observer can visually perceive the projected image well.
The reflective layer is configured to be suitable for reflecting light of the image display device. The reflective layer is a coating of the glass plate that reflects incident light, which preferably comprises or consists of at least one elemental metal and/or at least one metal oxide. The metal is preferably selected from the group comprising aluminium, tin, titanium, copper, nickel chromium, cobalt, iron, manganese, zirconium, cerium, yttrium, silver, gold, platinum and palladium or mixtures thereof. Particularly preferably, the reflective layer is formed on the basis of aluminum or nichrome. Aluminum and nichrome are more suitable for reflecting visible light. If something is for example "based on" a material, it is composed for the most part of that material, in particular essentially of that material, except for possible impurities or dopants.
Alternatively, the reflective layer may be a metal-containing or metal-free reflective film as well as a metal-coated film. The reflective film may be applied on different sides of the vehicle glazing panel by means of an adhesive layer or on a masking layer. But it is particularly preferred that the reflective film is disposed within the thermoplastic interlayer. "within the thermoplastic interlayer" may mean that the reflective layer is disposed between two thermoplastic films prior to lamination or is pressed into one thermoplastic film by pressure.
For producing the reflective layer, the paste is applied to the glass plate or film, for example by means of a vapor deposition method, for example an atmospheric pressure plasma Coating method, spraying (Spray-Coating) or by means of a sol-gel method and, if appropriate, subsequent baking or annealing. The paste is preferably applied to the glass plate or film in a printing process, in particular by means of screen printing, pad printing or offset printing. The applied paste is then baked, i.e. compressed by heat treatment. Advantageously, the applied paste is dried at a temperature of 50 ℃ to 180 ℃ and calcined at a temperature of 200 ℃ to 1000 ℃, in particular at a temperature of 400 ℃ to 700 ℃. The film is preferably a polymer film comprising polyethylene terephthalate (PET), polypropylene (PP) and/or Polyethylene (PE), or the film in particular comprises PET, PP and/or PE.
The paste comprises a printable metal solution in which at least one metal is predominantly bound into a composite. The paste may further comprise a solvent, preferably selected from alcohols, glycols, polypropylene glycols and derivatives thereof, and/or a thickener, preferably cellulose derivatives or polyacrylic acid.
For producing the reflective layer, the coating is alternatively applied to the glass plate or film preferably by Physical Vapor Deposition (PVD), particularly preferably by cathode sputtering and very particularly preferably by magnetic field-supported cathode sputtering ("magnetron sputtering"). Such coatings can be produced with particularly high optical quality and particularly small thicknesses.
In principle, the coating can be applied, for example, by means of Chemical Vapor Deposition (CVD), plasma-enhanced vapor deposition (PECVD), by vapor deposition or atomic layer deposition (atomic layer deposition, ALD). The coating is preferably applied to the glass sheet prior to lamination.
For example, the reflective layer comprises at least one metal oxide, optionally at least one solvent and/or at least one thickener, and unavoidable impurities, the proportion of impurities in the reflective layer being less than 5 wt.%, preferably less than 1 wt.%. The content of metal oxide in the reflective layer is preferably at least 70%, preferably at least 80%, in particular at least 90%. Advantageously, the properties of the reflected light can be improved by the reflective layer compared to a mere reflection of light on a glass plate.
In an advantageous embodiment of the invention, the reflective layer has a refractive index of greater than 15%, preferably greater than or equal to, for light in the visible wavelength rangeTotal reflectance of 25% (R) L ) The reflectivity is measured at an angle of incidence of 65 deg. from normal. The light here preferably includes s-polarized light and p-polarized light in the visible wavelength range.
Therefore, the proportion of reflected light is relatively high, and the reflectance of light (R L ) For example, about 25%.
Furthermore, a relatively high proportion of light polarized in the plane of incidence (p-polarized) can also be advantageously reflected.
In a further advantageous embodiment of the invention, the reflective layer has a reflectivity (R) for p-polarized light in the visible wavelength range of more than 5%, preferably more than 15% p-L ) The reflectivity is measured at an angle of incidence of 65 deg. from normal. The visible wavelength range is preferably 380nm to 780nm in the scope of the present invention.
It is particularly preferred that the above-mentioned reflection values apply to s-polarized light and p-polarized light or to p-polarized light in the wavelength range used by the light source. The reference to polarization direction here relates to the plane of incidence of the radiation on the composite glass pane. p-polarized radiation represents radiation whose electric field oscillates in the plane of incidence. s-polarized radiation means radiation whose electric field oscillates perpendicular to the plane of incidence. The plane of incidence is formed by the incident vector and the surface normal of the composite glass sheet at the geometric center of the illuminated area.
The invention is based on the following recognition: the reflective layer overlapping the at least one normally opaque masking strip enables a good image display with a high contrast with respect to the masking strip so that it appears bright and is therefore also very easy to identify. This can advantageously reduce the power of the image display device and thus reduce the power consumption. This is an important advantage of the present invention. The contrast of the projected image projected onto the reflective layer is at least 2:1, preferably at least 3:1 and particularly preferably at least 5:1. Contrast is the ratio between the light intensities of the brightest and darkest points of an image. The possibilities for measuring contrast are well known to the skilled person.
The masking strip is preferably applied to the at least one glass pane in a printing process, in particular a screen printing process. The printing ink is printed onto the glass plate and then dried or baked, preferably at a temperature of up to 700 ℃. The printing ink is preferably durable to light, solvents and abrasion. The masking strip may transition from a solid coating to a point of a different size. These so-called screen-printed dots should eliminate the visual solid impression of a black screen-printed edge.
The at least one masking strip is preferably black and may also be referred to as black print or overlay print. The material of the masking strip may also be applied to the glass sheet by other common application methods, such as wiping, roll coating, spraying, etc., and then preferably baked.
According to a preferred embodiment of the vehicle glazing panel, the at least one masking strip is composed of a single layer. This has the advantage that the manufacture of the vehicle glazing is particularly simple and inexpensive, since only a single layer has to be formed for the masking strip.
Masking strips can in principle be applied to either side of the glass pane. In the case of composite glass sheets, the masking strip is preferably applied on the inner side of the first glass sheet (side II) or on the inner side of the second glass sheet (side III), where it is protected from external influences. Particularly preferably, masking strips are applied to the inner side (II-th side) of the first glass pane.
According to a preferred embodiment of the vehicle glazing according to the invention, which is constructed in the form of a composite glazing, the reflective layer is arranged on the outside (IV-th side) of the second glazing, which enables particularly simple production. As the inventors can demonstrate, in this arrangement the proportion of reflected light is particularly high. Furthermore, disturbing sub-images can be avoided. Although the reflective layer is generally very weather-resistant, the reflective layer may be covered by a cover layer, in particular a polymer layer or a glass layer, in order to thereby protect it from external influences. The glass layer can be arranged on the composite glass pane, in particular by means of a thermoplastic interlayer.
According to a further preferred embodiment of the vehicle glazing according to the invention, which is constructed in the form of a composite glazing, the reflective layer is arranged on the inner side (III-th side) of the second glazing, which has the advantage that the reflective layer is protected from external influences.
According to a further preferred embodiment of the vehicle glazing according to the invention, which is constructed in the form of a composite glazing, the reflective layer is arranged on or over the (opaque) masking layer on the inner side (II-th side) of the first glazing. As the invention can surprisingly show, in this arrangement the proportion of reflected light with p-polarization is particularly high, which has the advantage that the HUD display can also be seen well with the aid of sunglasses with polarized lenses. One or more additional layers may be provided between the masking layer and the reflective layer. Alternatively, the reflective layer may be applied directly on the masking layer.
According to a further preferred embodiment of the vehicle glazing according to the invention, at least one further masking strip is provided on the inner side (III) of the second glazing panel and/or on the outer side (IV) of the second glazing panel, in addition to the (opaque) masking strip on the inner side (II-th side) of the first glazing panel. The further masking strip serves to improve the adhesion of the glass pane and is preferably added with ceramic particles which give the masking strip a rough and adherent surface, which on the IV-th side, for example, supports the bonding of the vehicle glass pane into the vehicle body. On the III-th side, this facilitates lamination of two single glass sheets of the composite glass sheet. Masking strips, preferably arranged on the II-th side, are also added with ceramic particles. Further masking strips applied to the outer side (IV-th side) of the second glass pane can also be provided for aesthetic reasons, for example in order to mask the edges of the reflective layer or the edges forming the transition to the transparent region.
In one section, in which the reflective layer is arranged overlapping the opaque masking strip on the II-th side, the masking strip is preferably provided with a widening, i.e. has a greater width (perpendicular to the extension) than in the other section. The masking strip can be adapted in this way to the dimensions of the reflective layer.
The vehicle glazing panel preferably has an upper edge (also referred to as a roof edge) which faces the roof of the vehicle in the installed position and a lower edge (also referred to as an engine edge) which faces the floor of the vehicle. The upper and lower edges are connected to each other by two lateral edges extending substantially perpendicular to the upper and lower edges.
In a preferred embodiment of the invention, the reflective layer extends over the entire width of the vehicle glazing panel. The reflective layer extends completely from one side edge to the other side edge. The reflective layer is arranged in the lower edge section directly adjoining the lower edge. The width of the reflective layer is preferably 2cm to 20cm, particularly preferably 3cm to 15cm. In this embodiment, the vehicle glazing is preferably a windshield of an automobile. The reflective layer is arranged here outside the region of the windshield that is provided for perspective. In the european union market, this means that the reflective layer is arranged under the fields of view a and B of the windscreen according to ECE-R43. Thus, important information, such as current driving speed, navigation prompts or warning prompts, can be projected into the driver's field of view, which the driver can perceive without having to take his line of sight away from the lane. The reflective layer may also replace the function of the same type of display that occupies space in the dashboard as part of the heads-up display system, thereby freeing up space in the vehicle.
The at least one glass pane preferably comprises or consists of glass, particularly preferably flat glass, float glass, quartz glass, borosilicate glass, soda lime glass, aluminosilicate glass or transparent plastic, preferably rigid transparent plastic, in particular polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and/or mixtures thereof. Suitable glasses are known, for example, from EP 0847965 B1.
The at least one glass sheet may be transparent or may be tinted or dyed. The windscreen must have sufficient transparency in the central visible region, preferably at least 70% in the main viewing region a, according to ECE-R43. The at least one glass sheet is preferably curved, i.e. it has a curvature.
The at least one glass pane may have other suitable, per se known coatings, for example an anti-reflection coating, an anti-adhesion coating, an anti-scratch coating, a photocatalytic coating or a sun protection coating or a low-emissivity coating.
The thickness of a glass sheet can vary widely and can be adjusted as required by the particular situation. Glass sheets having a standard thickness of 1.0mm to 25mm, preferably 1.4mm to 2.1mm, are preferably used. The size of the glass sheets can vary widely and depends on the application.
The vehicle glazing may have any three-dimensional shape. Preferably, the at least one glass plate has no shadow areas, so that it can be coated, for example, by cathode sputtering. The at least one glass sheet is preferably flat or slightly or strongly curved in one or more directions of space. The at least one glass sheet may be colorless or tinted.
The at least one thermoplastic interlayer comprises or consists of at least one thermoplastic, preferably polyvinyl butyral (PVB), ethylene Vinyl Acetate (EVA) and/or Polyurethane (PU) or copolymers or derivatives thereof, optionally in combination with polyethylene terephthalate (PET). The thermoplastic interlayer may also comprise, for example, polypropylene (PP), polyacrylate, polyethylene (PE), polycarbonate (PC), polymethacrylate, polyvinylchloride, polyacetate resin, casting resin, acrylate, fluorinated ethylene-propylene, polyvinylfluoride and/or ethylene-tetrafluoroethylene or copolymers or mixtures thereof.
The thermoplastic interlayer preferably comprises or preferably consists of polyvinyl butyral (PVB), particularly preferably of polyvinyl butyral (PVB) and additives known to the skilled worker, for example plasticizers. The thermoplastic intermediate layer preferably comprises at least one plasticizer.
Plasticizers are chemical compounds that make plastics softer, more flexible, more pliable and/or more elastic. They move the thermo-elastic range of the plastic to a lower temperature, so that the plastic has the desired more elastic properties over the range of use temperatures. Preferred plasticizers are carboxylic esters, especially the less volatile carboxylic esters, fats, oils, soft resins and camphor. The other plasticizers are preferably aliphatic diesters of triethylene glycol or tetraethylene glycol. 3G7, 3G8 or 4G7 are particularly preferably used as plasticizers, where the first digit indicates the number of ethylene glycol units and the last digit indicates the number of carbon atoms in the carboxylic acid moiety of the compound. For example 3G8 represents triethylene glycol di (2-ethylhexanoate), i.e. formula C 4 H 9 CH(CH 2 CH 3 )CO(OCH 2 CH 2 ) 3 O 2 CCH(CH 2 CH 3 )C 4 H 9 Is a compound of (a).
Preferably, the thermoplastic intermediate layer comprises at least 3 wt.%, preferably at least 5 wt.%, particularly preferably at least 20 wt.%, even more preferably at least 30 wt.% and in particular at least 40 wt.% of plasticizer. The plasticizer preferably comprises or consists of triethylene glycol di (2-ethylhexanoate).
It is further preferred that the thermoplastic intermediate layer comprises at least 60 wt.%, particularly preferably at least 70 wt.%, in particular at least 90 wt.% and for example at least 97 wt.% of polyvinyl butyral.
The thermoplastic interlayer may be formed from a single film or may be formed from more than one film.
The thermoplastic intermediate layer may be formed from one or more thermoplastic films stacked on top of each other, the thickness of the thermoplastic intermediate layer preferably being 0.25mm to 1mm, typically 0.38mm or 0.76mm. However, it is also conceivable for the thickness to be about 10 μm in the case of transparent adhesives.
The thermoplastic intermediate layer may also be a functional thermoplastic intermediate layer, in particular an intermediate layer having acoustic damping properties, an intermediate layer reflecting infrared radiation, an intermediate layer absorbing infrared radiation and/or an intermediate layer absorbing UV radiation. Thus, the thermoplastic intermediate layer may also be a bandpass filter film hiding the visible light narrow band, for example.
The heads-up display system includes an image display device assigned to the reflective layer, the image display device having an image display aligned with the reflective layer, an image of the image display being reflected by the reflective layer into the vehicle interior space. If a plurality of reflective layers are provided, a corresponding number of image display devices may be provided.
The invention further relates to a vehicle having a head-up display system according to the invention. The image display device is preferably supplied with power by the onboard electrical system of the vehicle. The current of the on-board electrical system can be generated, for example, by solar cells on the roof of the vehicle.
The invention also relates to a method for manufacturing a head-up display system according to the invention. The method comprises the following steps:
(a) At least one masking strip is applied in the edge region of at least one glass pane,
(b) A reflective layer is provided on the vehicle interior space side in the region of the masking strip, and
(c) The image display device and its geometry are arranged relative to the vehicle glazing.
The masking strip is preferably applied to the at least one glass pane in a printing process, in particular in a screen printing process or by other customary application methods, such as wiping, roll coating, spraying, etc., and is then preferably baked. The reflective layer is preferably applied to the glass plate in a printing process and baked.
For producing the composite glass panes, at least two glass panes are preferably connected to one another (laminated) by means of at least one thermoplastic adhesive layer under the action of heat, vacuum and/or pressure. Methods known per se for manufacturing composite glass sheets can be used. For example, the so-called autoclave process can be carried out at elevated pressures of about 10bar to 15bar and temperatures of 130 ℃ to 145 ℃ for about 2 hours. The vacuum bag process or vacuum ring process known per se works, for example, at about 200mbar and 130℃to 145 ℃. The two glass sheets and the thermoplastic interlayer may also be pressed in a calender between at least one pair of rolls to form a composite glass sheet. Apparatuses of this type are known for producing composite glass sheets and generally have at least one heating channel before the press. The temperature during the pressing process is, for example, 40 ℃ to 150 ℃. Combinations of calender and autoclave processes have proven particularly useful in practice. Alternatively, a vacuum laminator may be used. They consist of one or more heatable and evacuable chambers in which a first glass pane and a second glass pane can be laminated at a reduced pressure of 0.01mbar to 800mbar and a temperature of 80 ℃ to 170 ℃ in, for example, about 60 minutes.
The invention further relates to the use of the head-up display system according to the invention with a vehicle glazing for a vehicle, in particular a motor vehicle, for land, air or water traffic. According to the invention, a vehicle glass pane is preferably used as a vehicle windshield.
Advantageously, the composite glazing panel may be a windscreen or sunroof glazing of a vehicle or a separate glazing panel in other vehicle glazing, such as a vehicle, preferably a rail vehicle or bus. In principle, the composite glass pane featuring a vehicle glass pane can also be a building glazing, for example a building glazing in an facade of a building or a partition glass pane in the interior of a building.
The various embodiments of the invention may be implemented individually or in any combination. In particular, the features described above and to be described below can be used not only in the described combinations but also in other combinations or alone, without leaving the scope of the invention.
Drawings
The invention is explained in detail below by means of examples with reference to the accompanying drawings. Simplified, not-to-scale illustrations are as follows:
FIG. 1 illustrates a cross-sectional view of one embodiment of a heads-up display system according to the present invention;
FIG. 2 shows a top view of the vehicle glazing panel of FIG. 1;
FIGS. 3-4 illustrate cross-sectional views of different embodiments of a vehicle glazing panel;
FIG. 5A illustrates a cross-sectional view of the heads-up display system of FIG. 5;
fig. 5 shows a further variant of a head-up display system, in which a plan view of an arrangement system of an image display device is shown;
FIG. 6A illustrates a cross-sectional view of the heads-up display system of FIG. 6;
fig. 6 shows a further preferred variant of the head-up display system, in which a top view of the arrangement system of the image display device is shown; and
fig. 7 shows a further preferred variant of the head-up display system, in which a top view of the arrangement system of the image display device is shown.
Detailed Description
Fig. 1 shows a cross-sectional view of one embodiment of a heads-up display system 100 according to the present invention in a vehicle in a highly simplified schematic diagram. A top view of a vehicle glazing panel 1 of a heads-up display system 100 is shown in fig. 2. The cross-sectional view of fig. 1 corresponds to the section line A-A of the vehicle glazing panel 1 as shown in fig. 2.
The vehicle glazing 1 is configured in the form of a composite glazing (see also fig. 3 to 4) and comprises a first glazing 2 (for example an outer glazing) and a second glazing 3 (for example an inner glazing) which are fixedly connected to each other by a thermoplastic interlayer 4. The vehicle glass pane 1 is installed into the vehicle and separates the vehicle interior space 12 from the external environment 13. The vehicle glazing 1 is, for example, a windshield of a motor vehicle. Alternatively, the vehicle glazing panel has only a single ply of glazing, preferably in the form of a thermally pre-stressed single ply of safety glass (not shown).
The first glass pane 2 and the second glass pane 3 are each made of glass, preferably thermally prestressed soda lime glass, and are transparent to visible light. The thermoplastic interlayer 4 is made of a thermoplastic, preferably of polyvinyl butyral (PVB), ethylene Vinyl Acetate (EVA) and/or polyethylene terephthalate (PET).
The outer surface I of the first glass pane 2 faces the external environment 13 and is at the same time the outer surface of the vehicle glass pane 1. The inner surface II of the first glass plate 2 and the outer surface III of the second glass plate 3 are each directed towards the intermediate layer 4. The inner surface IV of the second glass pane 3 faces the vehicle interior space 12 and is at the same time the inner surface of the vehicle glass pane 1. It goes without saying that the vehicle glazing panel 1 may have any suitable geometry and/or curvature. As the vehicle glass sheet 1, it generally has a convex camber.
In the edge region 11 of the vehicle glazing unit 1, the frame-like encircling first masking strip 5 is located on the inner side (II-th side) of the first glazing unit 2. The first masking strip 5 is opaque and prevents the structure provided inside the vehicle glass pane 1, such as an adhesive tape for adhering the vehicle glass pane 1 into the vehicle body, from being seen. The first masking strip 5 is preferably black. The first masking strip 5 is made of a non-conductive material commonly used for masking strips, such as baked black-tinted screen-printed ink.
Furthermore, the vehicle glass pane 1 has a second masking strip 6 made of an electrically non-conductive material on the outer side IV of the second glass pane 3 in the edge region 11. The second masking strip 6 is configured as a frame-like surround. Similar to the first masking strip 5, the second masking strip 6 is made of a non-conductive material commonly used for masking strips, such as baked black-tinted screen-printing ink.
On the outer side IV of the second glass pane 3 there is a reflective layer 9 which is applied to the glass pane 3 and baked, for example by means of magnetron sputtering or as a paste in a printing process. The reflective layer is a metal oxide coating comprising at least one metal oxide or is for example nichrome.
The reflective layer 9 is arranged in a vertical line of sight through the vehicle glazing panel 1 overlapping the first masking strip 5, the first masking strip 5 completely covering the reflective layer 9, i.e. the reflective layer 9 has no sections which do not overlap the first masking strip 5. The reflective layer 9 is provided here, for example, only in a lower (engine-side) section 11' of the edge region 11 of the vehicle glazing 1. However, it is also possible to provide the reflective layer 9 in the upper (top side) section 11″ or in a side section of the edge region 11. Furthermore, a plurality of reflective layers 9 can be provided, which are arranged, for example, in the lower (engine-side) section 11' and in the upper (top-side) section 11″ of the edge region 11. For example, the reflective layers 9 may be arranged such that a (partially) surrounding image is produced.
The first masking strip 5 widens in the lower (engine-side) section 11 'of the edge region 11, i.e. the first masking strip 5 has a greater width in the lower (engine-side) section 11' of the edge region 11 than in the upper (top-side) section 11″ of the edge region 11 of the vehicle glazing panel 1 (and in the side sections of the edge region 11 which are not visible in fig. 1). The "width" is understood to be the dimension of the first masking strip 5 extending perpendicular thereto. The reflective layer 9 is arranged here, for example, above the second masking strip 6 (i.e. does not overlap), it being possible for aesthetic reasons to also overlap.
The head-up display system 100 also has an image display device 8 as an imager provided in the instrument panel 7. The image display device 8 serves to generate light 10 (image information) which is directed at the reflective layer 9 and is reflected by the reflective layer 9 as reflected light 10' into a vehicle interior space 12, where it can be seen by an observer, for example a driver. The reflective layer 9 is configured to be suitable for reflecting light of an image display device, i.e. an image of an image display. For example, the image display device 8 can also be arranged in or on the a-pillar of the motor vehicle (on the vehicle interior side, respectively), if the reflective layer 9 is positioned in a suitable manner for this purpose. If a plurality of reflective layers 9 are provided, a single image display device 8 may be assigned to each reflective layer 9, i.e. a plurality of image display devices 8 may be provided. For example, the vehicle pane 1 may also be a roof pane, side pane or rear pane. The vertical distance between the individual image display devices 8 and the area of the reflective layer 9, which is provided for reflecting the light 10 of the image display device 8, is preferably 0.1cm to 10cm, such as 2cm, independently of one another. The image display devices 8 are, for example, TFT displays and the amount of light emitted by each image display device 8 is, for example, 600 lumens. The image display device 8 is electrically connected to an on-board electrical system of the vehicle, for example, and is thereby supplied with power (not shown).
If more than one projection image 14 should be displayed on the reflective layer 9, these projection images can also be produced by more than one image display device 8. For example, the vehicle pane 1 may also be a roof pane, side pane or rear pane. The vertical distance of the image display device 8 to the area of the reflective layer 9, which is arranged to reflect the light 10 of the image display device 8, is preferably 0.1 to 10cm, such as 2 cm. The image display device 8 is for example a TFT display and the amount of emitted light is for example 600 lumens. The image display device 8 is electrically connected to an on-board electrical system of the vehicle, for example, and is thereby supplied with power (not shown). Embodiments according to the invention of one or more image display devices 8 are described in fig. 5, 6 and 7.
In the top view of fig. 2, the reflective layer 9 is shown extending along the lower section 11' of the edge region 11.
Referring now to fig. 3 to 4, there are shown cross-sectional views of different embodiments of a vehicle glazing 1. The cross-sectional views of fig. 3 to 4 correspond to the section line A-A in the lower section 11' of the edge region 11 of the vehicle glazing unit 1 shown in fig. 2.
In the variant of the vehicle glazing 1 shown in fig. 3, the first (opaque) masking strip 5 is located on the inner side (II-th side) of the first glazing 2. The reflective layer 9 is applied on the outer side (IV-th side) of the second glass plate 3. Light 10 from the image display device 8 is reflected by the reflective layer 9 as reflected light 10' into the vehicle interior space 12. The polarization (s-polarization, p-polarization) of the light 10, 10' is schematically shown. The advantage of this variant is that a relatively large proportion of the incident light 10 is reflected. Furthermore, the image can be well recognized with high contrast in front of the background of the opaque (first) masking layer 5.
The variant of the vehicle glazing 1 shown in fig. 4 differs from the variant of fig. 3 only in that the reflective layer 9 is applied on the (first) masking layer 5. A particular advantage of this variant is that a relatively large proportion of the p-polarization of the incident light 10 is reflected. Furthermore, the image can be well recognized with high contrast in front of the background of the opaque (first) masking layer 5. The reflective layer 9 is well protected from external influences inside the composite glass pane.
In all embodiments, the reflective layer 9 is provided on the vehicle interior space side of the first masking strip 5, i.e., the reflective layer 9 is located in front of the first masking strip 5 on a line of sight looking into the inside of the vehicle glass pane 1.
Fig. 5 shows a top view of the arrangement system of the image display device 8 in front of the vehicle glazing panel 1 of the head-up display system 100. The vehicle glass pane 1 is constructed, for example, as described in fig. 1. The vehicle glazing panel 1 has, for example, the geometry and bending/curvature common to windshields. The vehicle glazing 1 separates a vehicle interior space 12 from an external environment 13. The vehicle glass panel 1 is mounted in a vehicle, for example, as a windshield.
Head-up display system 100 may include image display device 8 n These image display devices 8 n Respectively one image 14 n Projected onto the reflective layer 9 of the vehicle glazing 1. Image display device 8 n Is located in the vehicle interior 12 and comprises, for example, a first image display device 8 1 Second image display device 8 2 Third image display device 8 3 Fourth image display device 8 4 Fifth image display device 8 5 Sixth image display device 8 6 And (d)Seven-image display device 8 7 . The seven image display devices 8 of the system 8 are arranged 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 Shaped as a rectangle, but may have any other shape. Image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 Are arranged in succession and side by side along the horizontal curvature of the vehicle glazing 1 so that the individual image display devices 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 The distance to the inside (outside IV) of the vehicle glass pane is substantially the same. Image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 Is arranged horizontally with respect to the surface normal of the vehicle floor and projects an image onto different areas of the reflective layer 9 of the vehicle glazing 1. Image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 Are arranged side by side in a flat configuration. Image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 Is arranged arcuately in a horizontal plane.
FIG. 5A is a vehicle glass pane 1 and a fourth image display device 8 as shown by section line A-A' in FIG. 5 4 Is a cross-sectional view of (c). Fourth image display device 8 4 Is arranged horizontally with respect to the surface normal of the vehicle floor and emits visible light 10 onto the reflective layer 9 of the vehicle glazing 1. The light 10 is reflected on the reflective layer 9 in the direction of the eyes of the observer 15. The reflected light 10' may thus be visually perceived by the viewer 15 as a projected image 14. For simplicity, the projection image 14 is shown behind the vehicle glazing 1 in fig. 5A, although the light 10 is actually reflected at the reflective layer 9 into the vehicle interior space 12.
The arrangement system of the image display device 8 enables a plurality of different projection images 14 to be produced over a large area of the vehicle glazing panel 1. The image V can thus be visually perceived by a plurality of occupants of the vehicle. The projected image 14 may, for example, convey information that is typically displayed in the dashboard in the form of a display of the same type (e.g., a speed display, a tank display, or an engine speed). Therefore, the arrangement system using the image display device 8 reduces the space requirement in the vehicle. The projection image 14 appears in the field of view of the observer 15 in an inclined plane in front of the vehicle glazing 1. The oblique plane of the projection image 14 here relates to a viewing plane E perpendicular to the viewing direction of the observer 15.
The variant of the head-up display system 100 shown in fig. 6 differs from the variant of fig. 5 only in that seven image display devices 8 of the system 8 are arranged 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 Is arranged at a specific angle gamma with respect to the reflective layer 9. Here, the corresponding image display device 8 is referred to 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 Is displayed by the corresponding image display device 8 with respect to the reflective layer 9 (main surface H) 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 An angle gamma at the geometric center of the illuminated area. FIG. 6A is a vehicle glass pane 1 and a fourth image display device 8 as shown by section line A-A' in FIG. 6 4 Is a cross-sectional view of (c).
The individual image display devices 8 are selected in such a way in fig. 6 and 6A 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 The angle y with respect to the reflective layer 9 is such that the projected image 14 is as parallel as possible to the viewing plane E of the viewer 15. Image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 The set angle γ is selected according to the local bending of the vehicle glass pane 1 and the inclination of the vehicle glass pane 1 relative to the vehicle floor. Seven image display devices 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 The angle gamma of each of the reflective layers may be different.
Head-up display system 100-shown in fig. 6 and 6AAspect can optimize the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 The dimensions used and thus the costs and the installation space in the instrument panel are reduced. On the other hand, by seven image display devices 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 The tilting of (2) reduces the gaps between the projected images 14 and thus the visual gaps in the user interface. Furthermore, the corresponding projection image 14 appears clearer to the observer 15 and is free from distortion. If the image display device 8 is normally surrounded 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 The occurrence of voids can be further reduced if the edge regions unsuitable for emitting light 10 are configured with as small a width as possible. The image display device 8 is particularly preferable 1 、8 2 、8 3 、8 4 、8 5 、8 6 、8 7 There is no circumferential edge area.
Fig. 7 shows six image display devices 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 These image display devices are arranged side by side in front of the vehicle glazing 1 in a top view of the arrangement system 8 of (a). Image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 Is rectangular in configuration and is arranged along a vehicle glass pane 1. In a top view, the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 Image display devices 8 that are not formed side by side with each other 1 、8 2 、8 3 、8 4 、8 5 、8 6 But rather generates a curve. The curvature produced is for example asymmetric. All the image display devices are arranged at a specific angle γ of the main surface H with respect to the reflective layer 9 of the vehicle glass plate 1 as described with respect to fig. 6 and 6A. Each image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 The region 16 therebetween is triangular in shape and hasHas an acute angle. This means that the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 Is adjacent to the rear corner of the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 Is a rear corner of the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 Is not in contact with adjacent image display devices 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 . "rear angle" means the image display device 8 in plan view 1 、8 2 、8 3 、8 4 、8 5 、8 6 Is located farther from the vehicle glass pane 1. It should be noted that the "front angle" is the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 Is disposed closer to the corner of the vehicle glass pane 1.
The acute angle is directed towards the vehicle glazing 1 and is of different size for all regions 16. First image display device 8 1 And a second image display device 8 2 The acute angle β therebetween is, for example, between 3.5 ° and 5 °. In this example, the acute angle follows the first image display device 8 1 And increases with distance. Fifth image display device 8 5 And a sixth image display device 8 6 The acute angle ω between them is for example 5 ° and 8.5 °. By adjusting the image display means 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 The acute angle therebetween, the projected image 14 is reflected flatly toward the observer 15 so that the projected image can be more visually perceived. Therefore, less optical correction is required for the virtual image 14 projected onto the vehicle glass plate 1. Viewer 15 and remaining image display device 8 3 、8 4 、8 5 、8 6 Closer to the first and second image display means 8 1 、8 2 Sitting.
By "optically correct" of the projected image 14 is meant that the image display device 8 optically adjusts the displayed projected image 14 according to the geometric design of the vehicle glazing 1, the position of the observer 15 relative to the projected image 14, and the position of the image display device 8 relative to the vehicle glazing 1 to prevent or at least reduce geometric imaging errors on the vehicle glazing 1. But this optical correction results in a reduction of the projected image 14; it is therefore advantageous to reduce the optical correction to as small an extent as possible.
Depending on the curvature of the vehicle glazing 1 and the orientation of the image display device 8, an acute angle may also be present in the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 Everywhere the same is true from the first image display device 8 1 To sixth image display devices 8 6 Smaller or have different ratios to each other. This additionally depends on from which position the projected image 14 corresponds to a good visual perception by the observer 15.
Is positioned in the image display device 8 1 、8 2 、8 3 、8 4 、8 5 、8 6 The region 16 therebetween may also be configured as a trapezoid, the length of the longer base of which may vary.
From the above description, the present invention provides an improved vehicle glass plate or a head-up display system equipped with the same, which is capable of achieving good image display with high contrast with respect to a masking strip. Undesired secondary images can be avoided. The head-up display system according to the invention can be manufactured simply and at low cost using known manufacturing methods.
List of reference numerals
1 vehicle glazing
2 first glass plate
3 second glass plate
4 intermediate layer
5 first masking strip
6 second masking strip
7 instrument panel
8 image display device
8 1 First image display device
8 2 Second image display device
8 3 Third image display device
8 4 Fourth image display device
8 5 Fifth image display device
8 6 Sixth image display device
8 7 Seventh image display device
9 reflective layer
10. 10' light
11. 11', 11' "edge region
12 vehicle interior space
13 external environment
14 projection image
15 observer
16 area between two image display devices
100 head-up display system
I. II outside of the first glass plate 2, inside of the first glass plate 2
III, IV inner side of the second glass plate 3, outer side of the second glass plate 3
n1 to 10
Angle between gamma main surface H and reflective layer 9
Beta first and second image display device 8 1 、8 2 Angle therebetween
Omega fifth and sixth image display devices 8 5 、8 6 Angle therebetween
E view plane
H image display surface, main surface
A-A' section line
Claims (21)
1. Head-up display system (100) for a vehicle glazing (1) comprising an outer side (I) facing an external environment (13) and an inner side (IV) facing a vehicle interior space in a mounted state, comprising:
at least one transparent glass pane (2, 3),
at least one masking strip (5) in the edge region (11) of the glass pane (2, 3),
at least one reflective layer (9) for reflecting light, which is applied in particular by printing, and which is arranged on the vehicle interior side of the masking strip (5) in the region of the masking strip,
At least one image display device (8) assigned to the reflective layer (9) having an image display which is aligned with the reflective layer (9) and whose projection image (14) is reflected by the reflective layer (9) into the vehicle interior (12),
wherein the image display device (8) is curved in a horizontal direction in a plan view.
2. Head-up display system (100) according to claim 1, wherein the horizontally curved image display device (8) comprises 1 to 10, preferably 2 to 8, particularly preferably 3 to 6 image display devices (8 n ) And n represents an integer of 1 to 10.
3. Head-up display system (100) according to claim 1 or 2, wherein the image display device (8 n ) Are arranged in a horizontal plane in succession and side by side along the horizontal curvature of the vehicle glazing panel.
4. A head-up display system (100) according to any of claims 1 to 3, wherein the image display device (8 n ) To display the image on the corresponding image display device (8 n ) Is set at an angle gamma between the image display surface (H) and the reflective layer (9).
5. The heads-up display system (100) of claim 4 wherein the angle γ is, for each image display device (8 n ) Is different and said angle gamma is preferably in the range of 30 deg. to 90 deg..
6. The heads-up display system (100) according to any of claims 1 to 5, wherein an image (14) from a horizontally curved image display device (8) is reflected by a reflective layer (9) into a vehicle interior space (12).
7. The heads-up display system (100) of any of claims 1-6, wherein the image display device (8) has no surrounding edge regions unsuitable for emitting light.
8. The heads-up display system (100) according to any of claims 1-7, wherein the image display device (8) is curved corresponding to a horizontal curvature of a vehicle glass sheet (1) in an area illuminated by a projected image (14).
9. The heads-up display system (100) according to any of claims 1 to 8, wherein the amount of light emitted by the image display device (8) is at least 50 lumen, preferably at least 200 lumen, particularly preferably at least 600 lumen.
10. The heads-up display system (100) according to any of claims 1-9, wherein the image display device (8) is an LED display, an OLED display or a μled display.
11. Head-up display system (100) according to one of claims 1 to 10, wherein the vehicle glazing panel (1) has at least one masking strip (5) which is configured to be frame-shaped around and in particular has a greater width in a section (11 ') overlapping the reflective layer (9) than in a section (11') different from this section.
12. The heads-up display system (100) according to any of claims 1 to 11, wherein the vehicle glass sheet (1) has a reflective layer (9) containing at least one elemental metal or metal oxide selected from the group comprising aluminum, tin, titanium, copper, nickel, chromium, cobalt, iron, manganese, zirconium, cerium, yttrium, silver, gold, platinum and palladium or mixtures thereof.
13. The heads-up display system (100) according to any of claims 1-12, wherein the reflective layer (9) has a reflectivity of more than 5%, preferably more than 15%, for p-polarized light in the visible wavelength range, measured at an angle of incidence of 65 ° to the normal.
14. The heads-up display system (100) according to any of claims 1 to 13, wherein the reflective layer (9) is applied as a paste on the glass plate (2, 3) or film in a printing process and baked.
15. The heads-up display system (100) of any of claims 1-14 wherein the projected image (14) is displayed from post to post.
16. The head-up display system (100) according to any one of claims 1 to 15, wherein the horizontally curved image display device (8) comprises 2 to 8, preferably 3 to 6 image display devices (8 n ) N is an integer from 2 to 8, the image display device (8 n ) Is rectangular in shape and is arranged along a vehicle glass pane (1), and an image display device (8 n ) Is adjacent to the rear corner of the image display device (8 n ) And the image display device (8) n ) Is not in contact with the adjacent image display device (8) n ) The relief angle means the angle of the image display device (8 n ) Is located further from the corner of the vehicle glazing (1).
17. The heads-up display system (100) of claim 16 wherein each image display device (8 n ) The regions (16) in between are triangular in shape and have an acute angle and the acute angle faces the vehicle pane (1) and is different in size for all regions (16).
18. Head-up display system (100) according to any one of claims 1 to 17, wherein the vehicle glass pane (1) is constructed in the form of a composite glass pane and comprises a first glass pane (2) having an outer side (I) facing the external environment (13) in the installed state and having an inner side (II) and a second glass pane (3) having an inner side (III) facing the vehicle interior space (12) in the installed state and having an outer side (IV), the first and second glass panes being fixedly connected to one another by means of at least one thermoplastic interlayer (4), and the masking strip (5) being applied on the inner side (II) of the first glass pane (2).
19. Method for manufacturing a head-up display system (100) according to any of the claims 1 to 18, wherein,
(a) At least one masking strip (5) is applied in the edge region (11) of at least one glass pane (2, 3),
(b) A reflective layer (9) is arranged on the vehicle interior space side in the region of the masking strip (5), and
(c) An image display device (8) is arranged relative to the vehicle glass pane (1) and its geometry.
20. The method for manufacturing a head-up display system (100) according to claim 19, wherein the reflective layer (9) is applied as a paste on the glass plate (2, 3) or film in a printing process and baked.
21. Use of the heads-up display system (100) according to any of claims 1 to 18 in a vehicle for land, air or water traffic, in particular as a vehicle windshield.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22165650 | 2022-03-30 | ||
| EP22165650.7 | 2022-03-30 | ||
| PCT/EP2023/057589 WO2023186717A1 (en) | 2022-03-30 | 2023-03-24 | Head-up display for a vehicle window |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117321475A true CN117321475A (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202380009307.5A Pending CN117321475A (en) | 2022-03-30 | 2023-03-24 | Head-up display system for vehicle glazing |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117321475A (en) |
| WO (1) | WO2023186717A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2757151B1 (en) | 1996-12-12 | 1999-01-08 | Saint Gobain Vitrage | GLAZING COMPRISING A SUBSTRATE PROVIDED WITH A STACK OF THIN FILMS FOR SUN PROTECTION AND / OR THERMAL INSULATION |
| DE10359884A1 (en) * | 2003-12-19 | 2005-07-21 | Ferro Gmbh | Substrates with a transparent, reflective metal oxide partial coating, their preparation and application |
| US20100066645A1 (en) | 2006-11-29 | 2010-03-18 | Mikio Ishii | High visibility head-up display system |
| US20090295681A1 (en) | 2008-05-27 | 2009-12-03 | Gm Global Technology Operations, Inc. | Virtual Image System for Windshields |
| JP2012126252A (en) | 2010-12-15 | 2012-07-05 | Toyota Motor Corp | Light source device for vehicle |
| DE102018212046A1 (en) | 2018-07-19 | 2020-01-23 | Bayerische Motoren Werke Aktiengesellschaft | Method for providing a display in a motor vehicle and display device for a motor vehicle |
| DE102019133295A1 (en) * | 2019-12-06 | 2021-06-10 | Audi Ag | Motor vehicle with a display system and an operating method for this |
| JP7486602B2 (en) | 2020-04-16 | 2024-05-17 | サン－ゴバン グラス フランス | Head-up display (HUD) projection assembly |
-
2023
- 2023-03-24 CN CN202380009307.5A patent/CN117321475A/en active Pending
- 2023-03-24 WO PCT/EP2023/057589 patent/WO2023186717A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2023186717A1 (en) | 2023-10-05 |
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