WO2024052010A1

WO2024052010A1 - Display system for a vehicle with a restricted angular range

Info

Publication number: WO2024052010A1
Application number: PCT/EP2023/071231
Authority: WO
Inventors: Michele CAPPUCCILLI; Martin Arndt; Valentin SCHULZ; Gabriele REUFSTECK
Original assignee: Saint-Gobain Glass France
Priority date: 2022-09-06
Filing date: 2023-08-01
Publication date: 2024-03-14

Abstract

The present invention relates to a display system for a vehicle, comprising • - a windshield (10) having a transparent see-through region (D) and an opaque masking region (M), and • - an electronic visual display (20) directed at a display region (A) arranged in the masking region (M), wherein the display region (A) of the windshield (10) is equipped with a reflection layer (4) suitable for reflecting the radiation from the electronic visual display (20) for the purpose of creating a display picture, and wherein a micro-louver film (9) is arranged in the beam path of the electronic visual display (20).

Description

Display system for a vehicle with a restricted angular range

The invention relates to a display system for a vehicle and a vehicle equipped therewith.

Windshields for vehicles, in particular motor vehicles such as passenger cars, are designed as composite panes (laminated safety glass), which consist of an outer pane and an inner pane, which are laminated together via a thermoplastic intermediate layer. They typically have an opaque masking area, which is designed as a peripheral edge area and surrounds a central viewing area. The opaque masking area is primarily used to protect the adhesive used to bond the windshield to the vehicle body from UV radiation. If the windshield is equipped with electrical functions (for example a heating function), the necessary electrical connections can also be concealed in the masking area. The masking area is typically formed by a black masking print on the surface of the outer pane facing the intermediate layer.

It has been proposed to use the opaque masking area as a display area for a display system. For this purpose, the display area is provided with a reflective layer and irradiated with an imaging unit, for example a screen or a projector. What is on the reflective layer of the imaging unit can be perceived by a user, in particular the driver, as a display image. For example, reference is made to DE102009020824A1, WO2022073894A1 and W02022073860A1.

In this way, displays for the driver that were previously located in the dashboard area can be displayed on the windshield itself. On the one hand, this is aesthetically pleasing and, on the other hand, it increases driving safety because the driver does not have to divert his gaze far from the road to read the display. Examples of such displays are the driving speed, the time, the engine speed, the navigation system display, information about speed limits (road sign recognition), the image from a rear-facing camera and various status displays about the condition of the vehicle.

In a further development, such a display system can also be provided for the front passenger. This can include, for example, entertainment content on the windshield being represented. However, there is a risk that the driver will be disturbed or distracted by the passenger's display system, which will affect road safety. There is therefore a need for display systems of the type mentioned at the beginning, which display information for the passenger without distracting the driver.

Microlamella films are known as such. They are available in particular as films to be attached to the screen of notebooks and other mobile electronic devices. The microlamella films limit the angular range of the emitted light, so that the display can only be seen if the viewer is comparatively frontal in front of the screen. In this way, the screens can be protected from the view of strangers positioned off to the side.

The present invention is based on the object of providing an improved display system for a vehicle. The display system should be suitable for providing a display for the passenger of the vehicle without distracting or disturbing the driver.

The object of the present invention is achieved according to the invention by a display system according to claim 1. Preferred embodiments emerge from the subclaims.

The display system for a vehicle according to the invention comprises a windshield and (at least) one screen. The windshield has a transparent see-through area and an opaque masking area. The screen is directed toward a display area located in the masking area of the windshield. The windshield is equipped with a reflective layer in the display area, which is suitable for reflecting (at least partially) the radiation from the screen, thereby producing a display image. According to the invention, a microlamella film is arranged in the beam path of the screen.

The microlamella film is particularly suitable for limiting the angular range of said display image in the masking area of the windshield. This can be achieved by restricting the angular range of the light emitted from the screen, or by emitting the light from the screen at the original angular range and later passing through the microlouver film before reaching the Reflective layer hits. In this way, a display can be realized which is only intended for a vehicle occupant (in particular the front passenger) and can only be perceived by him, while vehicle occupants positioned laterally offset from him (in particular the driver) cannot perceive the display and are therefore not disturbed by the display or get distracted. That is the great advantage of the present invention.

The windshield is intended for a vehicle and can therefore also be referred to as a vehicle windshield. In a preferred embodiment, it is the windshield of a motor vehicle, in particular a passenger car or truck.

The windshield is typically designed as a composite pane and comprises an outer pane and an inner pane, which are connected to one another via a thermoplastic intermediate layer. The windshield is intended to separate the interior (vehicle interior) from the outside environment in the window opening of a vehicle that faces forward (in relation to the direction of travel). For the purposes of the invention, the inner pane refers to the pane of the windshield that faces the interior. The outer pane refers to the pane facing the external environment.

The windshield has a top edge and a bottom edge and two side edges running between them. The top edge refers to the edge that is intended to point upwards in the installed position. The lower edge refers to the edge that is intended to point downwards in the installed position. The top edge is often referred to as the roof edge and the bottom edge as the engine edge.

The outer pane and the inner pane each have an outside surface and an inside surface and a circumferential side edge surface running between them. For the purposes of the invention, the outside surface refers to the main surface which is intended to face the external environment in the installed position. For the purposes of the invention, the interior-side surface refers to the main surface which is intended to face the interior in the installed position. The interior surface of the outer pane and the outside surface of the inner pane face each other and are connected to one another by the thermoplastic intermediate layer. The outer pane and the inner pane are preferably glass panes, particularly preferably made of soda-lime glass, as is common for window panes. However, one or both of the panes can also be made from other types of glass, for example quartz glass, borosilicate glass or aluminosilicate glass, or from rigid, clear plastics, for example polycarbonate or polymethyl methacrylate. The windows can be clear or tinted or colored. The thicknesses of the outer pane and the inner pane are, independently of one another, preferably from 0.5 mm to 5 mm, particularly preferably from 1 mm to 3 mm.

The thermoplastic intermediate layer is (with the exception of any embedded functional films, which are often based on PET) preferably based on polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA) or polyurethane (PU) or made from mixtures or copolymers or derivatives thereof, particularly preferably based on PVB. The intermediate layer is typically formed from at least one thermoplastic film (connecting film), in particular based on PVB, EVA or PU. This means that the film consists largely of the polymer in question (proportion greater than 50% by weight). In addition to the polymer, the film can contain other additives, in particular plasticizers. If the reflection layer is designed as a reflection film and is embedded in the intermediate layer, the intermediate layer, in addition to this reflection film, preferably comprises at least two connecting layers (inner and outer connecting layers, with the inner connecting layer facing the inner pane and the outer connecting layer facing the outer pane), each of the connecting layers typically is formed from at least one connecting film, in particular based on PVB, EVA or PU. The reflection film is arranged between the connecting layers. The thickness of the connecting film (or each connecting film if there are several) is preferably from 0.2 mm to 1 mm. For example, PVB films with standard thicknesses of 0.38 mm or 0.76 mm can be used. Instead of films, polymeric coatings can also be used, especially if the thermoplastic layer in question is to be made very thin, for example with a thickness of 0.005 mm to 0.1 mm or 0.02 mm to 0.07 mm.

The windshield has an opaque masking area and a transparent see-through area. For the purposes of the invention, a masking area refers to an area of the windshield through which visibility is not possible. The light transmission of the masking area is less than 10%, preferably less than 5%, particularly preferably less than 2% and most preferably essentially 0%. For the purposes of the invention, a viewing area is an area of the windshield which allows a view through the windshield and which is intended for viewing. The viewing area is therefore transparent. The light transmission of the see-through area is preferably at least 70%. Light transmission means the total transmission, determined by the procedure for testing the light transmission of motor vehicle windows specified by ECE-R 43, Annex 3, § 9.1.

In a typical embodiment, the masking area surrounds the viewing area in a frame-like manner. The masking area is therefore arranged all around the viewing area. Typically, the masking area forms the peripheral edge area of the windshield and adjoins the side edge of the windshield. In a preferred embodiment, the masking area is therefore arranged in a peripheral edge area of the windshield and surrounds the viewing area.

In a preferred embodiment, the display area is arranged in a section of the masking area adjacent to the lower edge of the windshield. The display area is therefore arranged between the viewing area and the lower edge of the windshield. In the case of a frame-like masking area in the peripheral edge area of the windshield, a section of the masking area adjoins each edge (top edge, bottom edge, first and second side edge) and the display area is preferably arranged in that section which adjoins the lower edge.

The masking area is preferably formed by an opaque, in particular black, print (covering print) on at least one of the surfaces of the outer pane and/or the inner pane, particularly preferably on the interior-side surface of the outer pane. The cover print typically consists of a screen-printed and then baked enamel containing glass frits and colorants (especially pigments). Such masking prints are generally used, particularly for vehicle windows. The pigment is typically a black pigment, for example carbon black, aniline black, bone black, iron oxide black, spinel black and/or graphite. The cover print preferably has a thickness of 5 pm to 50 pm, particularly preferably 8 pm to 25 pm.

The masking area may alternatively be formed by an opaque polymeric film which is part of the intermediate layer and which is between the reflection layer and the Outer pane is arranged. For the purposes of the invention, an opaque film is understood to mean a film with a light transmission in the visible spectral range of less than 5%, in particular 0%.

The masking area can also be formed completely or partially by a functional element with electrically controllable properties, which can be darkened. Such a functional element comprises an active layer or layer sequence between two surface electrodes, by means of which an electrical voltage can be applied to the active layer (sequence) in order to adjust its optical properties. Functional elements that can be darkened in order to form an opaque masking area are, in particular, electrochromic functional elements and SPD (suspended particle device) functional elements. The opaque masking area only exists when the functional element is in a darkened state. The functional element can be applied to one of the surfaces of the outer pane or the inner pane, in particular the interior surface of the outer pane or the outside surface of the inner pane. The functional element can alternatively be provided as a multilayer film and arranged between two layers of the intermediate layer.

In a further development of the invention, there is a permanent masking area, which is formed in particular by a covering print (alternatively by an opaque polymeric film), and an area extending from this into the see-through area, which is provided with a functional element with electrically controllable properties (in particular an electrochromic functional element). The display area is partly arranged in the permanent masking area and partly in the area with the said functional element. Depending on the switching state, the area with the functional element belongs to the transparent area (if the functional element is switched to transparent) or to the masking area (if the functional element is darkened or switched to opaque). If a display is to be created which is completely or partially located in the area with the functional element, the functional element is darkened. If, on the other hand, only a display is to be generated that is arranged in the permanent masking area, the functional element can be switched to transparent in order to increase the size of the viewing area.

The opaque element that forms the masking area (in particular the cover print, the opaque polymer film and/or the functional element with electrically controllable properties) is arranged behind the reflection layer in the viewing direction, so that the latter can be irradiated by the screen. The reflection layer is therefore closer to the screen than the opaque element.

The screen is directed at the display area and irradiates it to produce a display image. The area of the windshield irradiated (or irradiable) by the screen is therefore the display area in the sense of the invention. According to the invention, a reflection layer is arranged in the display area of the windshield, which reflects the radiation from the screen towards the user in order to generate the display image. The screen irradiates the display area with electromagnetic radiation in the visible spectral range to generate the display image that the user perceives in the masking area. The radiation is in particular in the spectral range from 450 nm to 650 nm, for example with the wavelengths 473 nm, 550 nm and 630 nm (RGB).

The reflection layer preferably has a degree of reflection relative to the radiation from the screen of at least 10%, particularly preferably at least 15%. This is advantageous for high intensity and good quality of the secondary display image. The degree of reflection is, for example, from 10% to 100% or from 15% to 30%. The reflectance describes the proportion of the total irradiated radiation that is reflected. It is given in % (based on 100% irradiated radiation) or as a unitless number from 0 to 1 (normalized to the irradiated radiation). Plotted depending on the wavelength, it forms the reflection spectrum. In the context of the present invention, the statements on the degree of reflectance refer to the degree of reflectance measured at an angle of incidence of 65° to the surface normal on the interior side, which corresponds approximately to the irradiation from conventional screens. The information on the degree of reflectance refers to a reflection measurement with a light source that emits uniformly in the spectral range under consideration with a standardized radiation intensity of 100%.

The reflective layer covers at least the display area. However, it can also extend beyond the display area, i.e. additionally cover adjacent areas of the windshield. This can be advantageous in order not to have to position the reflection layer so precisely or in order to avoid display errors in the edge area of the display image, which could occur as a result of imperfect positioning of the reflection layer. The reflection layer can be designed in different ways. In a first preferred embodiment, the reflection layer is designed as a metal-containing coating. The metal-containing coating can be applied to a surface of the outer pane or the inner pane, for example the interior-side surface of the outer pane, the outside surface of the inner pane or the interior-side surface of the inner pane. Alternatively, the coating can be provided on a carrier film which is arranged between two layers of the thermoplastic intermediate layer. The carrier film forms a reflection film together with the coating. The carrier film is, for example, a film based on polyethylene terephthalate (PET), preferably made essentially of PET, with a thickness of 20 pm to 200 pm, preferably 25 pm to 75 pm.

The metal-containing coating can be a mirror-like metal layer which essentially reflects all of the radiation from the screen (degree of reflection compared to the radiation from the screen essentially 100%). Suitable metals are, for example, silver or aluminum. Suitable layer thicknesses are, for example, from 200 nm to 5 pm, in particular from 800 nm to 1.5 pm. The metal-containing coating can alternatively be formed from a plurality of thin layers, including at least one thin layer based on a metal, preferably based on silver. Due to their IR-reflecting and electrically conductive properties, coatings of this type are also used as solar control coatings or heatable coatings. The at least one layer based on a metal preferably contains at least 99% by weight of silver and has a thickness of, for example, from 5 nm to 20 nm. Such a coating has (partially) reflective properties in the visible range, so that it can serve as a reflection surface for the display system. The coating preferably also contains dielectric thin layers. The desired reflection characteristics, in particular the degree of reflection compared to the radiation from the screen, are achieved in particular through the choice of materials and thicknesses of the individual layers. The conductive coating can thus be adjusted appropriately, which is common in the technical field and well known to those skilled in the art. Dielectric layers or layer sequences are typically arranged above and below the metal layer. If the coating comprises several metal layers, each metal layer is preferably arranged between two typically dielectric layers or layer sequences, so that a dielectric layer or layer sequences is arranged between adjacent metal layers. The coating is therefore a thin film stack with n metal layers and (n+7) dielectric layers or Layer sequences, where n is a natural number and a lower dielectric layer or layer sequence is alternately followed by a metal layer and a dielectric layer or layer sequence. Common dielectric layers of such a thin-film stack are, for example, based on silicon nitride, silicon-metal mixed nitrides such as silicon zirconium nitride, titanium oxide, aluminum nitride, tin oxide, zinc oxide or tin-zinc mixed oxide and have a layer thickness of, for example, 3 nm to 200 nm. Blocker layers are also common, which protect the metal layers from degeneration and are typically designed as very thin metal-containing layers based on niobium, titanium, nickel, chromium and / or alloys thereof with layer thicknesses of, for example, 0.1 nm to 2 nm.

In a second preferred embodiment, the reflection layer is designed as a purely dielectric coating. The dielectric coating can in turn be applied to a surface of the outer pane or the inner pane, for example the interior-side surface of the outer pane, the outside surface of the inner pane or the interior-side surface of the inner pane. Alternatively, the coating can be provided on a carrier film (reflection film) and sandwiched between two layers of the intermediate layer, as described above in connection with the metal-containing coating. The dielectric coating is preferably a layer (for example thin film) made of a material with a higher refractive index (measured at 550 nm) than the substrate on which it is applied (outer pane, inner pane or carrier film). The layer is, for example, based on aluminum nitride, silicon nitride, zirconium nitride, silicon-zirconium mixed nitride, zirconium oxide, tin oxide, zinc oxide, tin-zinc mixed oxide, particularly preferably based on titanium oxide. The layer thickness is, for example, from 100 nm to 5 pm or from 500 nm to 2 pm. More complex multilayer coatings can also be used, in which layers with a higher refractive index (for example based on titanium oxide or silicon nitride) and layers with a lower refractive index (for example based on silicon oxide) are arranged alternately. The reflective effect is caused by interference effects and can be adjusted very specifically by choosing the layer thickness.

In a third preferred embodiment, the reflection layer is designed as a purely dielectric polymeric film which contains alternating individual layers with different refractive indexes. The dielectric reflection film is preferably arranged between two layers of the intermediate layer and is thereby incorporated into the intermediate layer. The Foil has no metal-containing coatings. It is a purely dielectric layer sequence made up of polymer layers with a higher refractive index and polymer layers with a lower refractive index, which are arranged alternately. At least one of the two types of layers is preferably based on PET. The other type of layer can also be based on PET, with the different refractive indices being achieved by suitable additives, based on a PET copolymer or based on another polymer, for example PMMA. By changing layers with different refractive indexes, optical interference effects are achieved, which can be adjusted appropriately for the respective application (in particular by choosing the layer thicknesses and refractive indices) in order to realize reflective properties in a desired spectral range. In this way, reflective properties in the visible spectral range can be achieved in order to use the film as a reflection surface for the display system according to the invention.

The screen irradiates the windshield via the inner window with electromagnetic radiation in the visible spectral range to generate the display image that a user located in the interior of the vehicle can perceive. The screen is therefore arranged on the interior side of the windshield and irradiates the windshield via the interior surface of the inner pane. The radiation from the screen is (partially) reflected on the reflection layer.

In principle, any type of screen can be used for the display system according to the invention, for example a field emission screen (FED), a liquid crystal screen (LCD), a thin film transistor screen (TFT-LCD), a cathode ray tube screen (CRT), a plasma screen, an organic light-emitting diode (OLED), a (true) LED screen or a surface conduction electron emitter display (SED). OLED and LCD screens are particularly common.

In a preferred embodiment, the screen is designed as a backlit transmissive imager. Such a screen includes a flat backlight and a transmissive imager, which are arranged flat one above the other. The transmissive imager faces the windshield and the first flat background lighting faces away from the windshield. The backlight is preferably at least as large as the transmissive imager so that the latter can be illuminated evenly. The backlight emits light with an angular range that determines the original angular range of the screen. This original angular range is intended to be limited by the lamellar film according to the invention.

The flat background lighting can be designed in any way, for example as a flat light guide (for example made of, for example, glass or transparent plastics such as polymethyl methacrylate (PMMA), polyethylene terephthalate (PET) or polycarbonate), which is provided with a light source (for example a plurality of light-emitting diodes), which is suitable is to couple light into the light guide via a side edge, and with decoupling means (for example light-scattering structures) which are suitable for coupling the light out of the light guide via a surface facing the imager,

LED panel (two-dimensional LED arrangement) that is aimed at the imager, electroluminescent film, flat OLED spotlight or

Plurality of cold cathode tubes.

The transmissive imager converts the light from the backlight into the desired display, which is then projected onto the windshield. The imager provides the light from the background lighting with information as it passes through it. The transmissive imager is preferably a liquid crystal display element (LCD panel).

The screen may include other elements well known to those skilled in the art, such as diffusers, light collimators or optical filters.

The display of the display system according to the invention is intended in particular for and assigned to a vehicle occupant (typically the front passenger). The said angular range is preferably selected such that this vehicle occupant can recognize the display, while another vehicle occupant positioned laterally offset from him (typically the driver) cannot recognize the display. The angular range can be specifically adjusted in this way through a suitable choice of the microlamella film.

As is easily apparent from the presented objective of the invention, the angular range in the sense of the invention relates to the lateral angular range of the display. “Sideways” refers to the intended viewing situation, with the viewer are arranged on the interior side of the windshield and look onto the interior surface of the inner pane. The lateral angle range determines the extent to which a viewer positioned laterally offset from the display area can see the display. The angle range therefore determines the side viewing angle of the display. The lateral angular range can also be referred to as the horizontal angular range due to its effect on a horizontal shift in the viewer's position.

The radiation emanating from a point in the display area is emitted in the form of a beam cone. The lateral angle range indicates the lateral extent of the jet cone. In a horizontal section through the beam cone, with the cutting line running horizontally between the side edges of the windshield, the lateral angular range is determined as the angle between the marginal rays delimiting the beam cone and the surface normal. If the radiation only emanated exactly vertically from the display area, exclusively along the surface normal and not in the form of a beam cone, the angular range would be 0°. The further the beam cone is expanded, the larger the amount of the angular range becomes.

The angular range can be determined by a viewer looking at the viewing screen and moving laterally away from it. From the position where he can no longer see the display, the angular range can be determined as the angle of the connecting line between the said position and the edge of the screen facing it to the surface normal of the screen. To compare angular ranges of different displays, these can be recorded, for example, with the same camera, which is moved laterally away from the screen, with the camera remaining aimed at the screen. The limit of the angular range is reached when the display in the camera recording is no longer perceptible.

Said angular range is typically in a range from 15° to 90°, for example from 15° to 60° or from 20° to 50° or from 20° to 40°. This achieves good results with typical vehicle dimensions.

The microlamella film is a polymeric film in which parallel (for example polymeric or metal) lamellae are formed with widths and spacings in the micrometer range, which limit the angular range of the light passing through. The angle range can be adjusted by the depth of the slats and the distances between adjacent slats become. Such microlamella films are known per se and are used, for example, as privacy filters on notebook monitors. Microlamella films are also referred to as “microlouvre” or “micro louvre”.

In order to limit the lateral angular range of the display, the micro-slat film is arranged in the beam path in such a way that the projection of the slats onto the windshield runs essentially vertically between the top edge and the bottom edge of the windshield.

The microlamella film can in principle be arranged in the external beam path or in the internal beam path of the screen. The external beam path refers to the beam path between the screen and the reflective layer - i.e. the beam path of the light after it has already been emitted from the screen. The internal beam path refers to the beam path within the screen before the light is emitted from the screen.

The microlamella film is preferably arranged in the external beam path, i.e. between the screen and the reflection layer. The particular advantage is that a conventional screen can be used and the microlamellar film can be retrofitted comparatively easily. Various configurations are possible.

In a first embodiment, the microlamella film is arranged directly on the screen, i.e. attached to its radiating surface. The microlamellar film can, for example, be glued to the screen. This configuration is particularly preferred. This arrangement is particularly space-saving and shadows cast on the screen or windshield can be avoided.

In a second embodiment, the microlamella film is arranged on a transparent screen, which is arranged in the beam path between the screen and the windshield. The screen can, for example, be a transparent plate made of glass or a plastic, for example PMMA, PET or polycarbonate.

In a third embodiment, the microlamella film is attached, for example glued, in the beam path on the interior surface of the inner pane. The microlamella film covers at least the entire display area, but can also extend beyond that. If the reflection layer is also positioned on the interior surface of the inner pane, it must of course be arranged between the inner pane and the microlamella film.

In a fourth embodiment, the microlamella film is attached, for example glued, in the beam path on the outside surface of the inner pane. The microlamella film covers at least the entire display area, but can also extend beyond that. This configuration is not possible if the reflection layer is arranged on the interior surface of the inner pane. Should the reflection layer also be positioned on the outside surface of the inner pane, the microlamella film must of course be arranged between the inner pane and the reflection layer.

In a fifth embodiment, the microlamella film is embedded in the beam path in the intermediate layer, in particular arranged between two connecting layers of the intermediate layer. The microlamella film covers at least the entire display area, but can also extend beyond that. This configuration is not possible if the reflection layer is arranged on the inner pane. If the reflection layer is also embedded in the intermediate layer as a reflection film, it must of course be arranged between the microlamella film and the outer slide. Reflection film and microlamella film can be arranged between the same connecting layers and be in direct contact. However, a connecting layer can also be arranged between the reflection film and the microlamella film.

In a sixth embodiment, the microlamella film is arranged in the beam path on the interior surface of the outer pane. The microlamella film covers at least the entire display area, but can also extend beyond that. This configuration is only possible if the masking area is formed by a covering pressure on the outer pane and the reflection layer is also arranged on the outer pane, with the microlamella film having a smaller distance from the inner pane than the reflection layer and covering pressure and with the reflection layer having a smaller distance from the inner pane than the cover pressure. The cover print, the reflection layer and the microlamella film are preferably applied in the order specified on the interior surface of the outer slide. The configurations in which the micro-lamellar film is arranged between the screen and the windshield are preferred because the micro-lamellar film can then be easily retrofitted and does not have to be integrated into the windshield. These are the said first, second and third embodiments.

The microlamella film can also be arranged in the internal beam path of the screen. If the screen includes a flat backlight and a transmissive imager, the microlamella film is arranged in particular between the flat backlight and the transmissive imager.

In an advantageous embodiment, the microlamella film is mounted in such a way that it can be moved into and out of the beam path of the screen. This is possible particularly advantageously if the microlamellar film is arranged on a transparent screen (cf. the aforementioned second embodiment of the arrangement of the microlamellar film in the external beam path). The screen can be mounted so that it can be folded, pushed or pivoted, so that it can be folded, pushed or pivoted into the beam path between the screen and windshield and can also be folded, pushed or pivoted out of the beam path again. The user can then switch between two operating modes: a first operating mode with the restricted angular range according to the invention and a second operating mode with an unrestricted angular range. In the second operating mode, the driver can also recognize the passenger's display - if distractions are to be avoided, the user moves the microlamellar film into the beam path, which switches to the first operating mode. In further developments, it is also conceivable that the selection of the operating mode is carried out automatically by a driving assistance system, for example switching from the second to the first operating mode when the driving assistance system detects a critical situation.

In a particularly advantageous embodiment, the radiation from the screen striking the windshield is p-polarized. The radiation is in particular essentially purely p-polarized - the p-polarized radiation component is therefore 100% or only deviates insignificantly from it. The indication of the polarization direction refers to the plane of incidence of the radiation on the windshield. P-polarized radiation refers to radiation whose electric field oscillates in the plane of incidence. S-polarized radiation refers to radiation whose electric field oscillates perpendicular to the plane of incidence. The plane of incidence is given by the incident vector and the Surface normal of the windshield spanned. The polarization, in particular the proportion of p- and s-polarized radiation, is determined at a point in the display area, preferably in the geometric center of the display area. If the windshield is curved, which is usually the case, this has an impact on the plane of incidence of the radiation. Therefore, slightly different polarization components can occur in the remaining areas, which is unavoidable for physical reasons. To provide the p-polarized radiation, for example, a polarization filter or a polarizing beam splitter can be arranged between the screen and the windshield in the beam path.

The radiation from the screen preferably hits the windshield at an angle of incidence of 45° to 70°, in particular 60° to 70°. In an advantageous embodiment, the angle of incidence deviates from the Brewster angle by a maximum of 10°. The p-polarized radiation is then only slightly reflected on the surfaces of the windshield. As a result, the reflection layer represents the only significant reflection surface for the radiation. If the radiation were also significantly reflected on the interior surface of the inner pane (air-glass transition), a so-called ghost image would arise, which would at least be annoying for the user, if not would even be completely unacceptable. The angle of incidence is the angle between the incidence vector of the radiation and the surface normal on the interior side (i.e. the surface normal to the external surface of the windshield on the interior side) in the geometric center of the display area. The Brewster angle for an air-glass transition in the case of soda-lime glass, which is generally used for window panes, is 57.2°. Ideally, the angle of incidence should be as close as possible to this Brewster angle. However, for example, angles of incidence of 65° can also be used, which are common for HUD projection arrangements, can be easily implemented in vehicles and only deviate to a small extent from the Brewster angle, so that the reflection of the p-polarized radiation only increases insignificantly.

The windshield has at least one display area with the restricted angular range according to the invention (irradiated by a screen with a microlamella film in the beam path). The windshield can also have one or more further display areas, namely one or more display areas according to the invention (each irradiated by a screen with a microlamella film in the beam path) and / or one or more conventional ones Display areas (each irradiated by a screen without microlamellar film in the beam path).

The windshield is preferably curved in one or more directions of space, as is particularly common for motor vehicle windows. Typical radii of curvature are in the range from about 10 cm to about 40 m. The interior surface of the inner pane is generally concavely curved, the outside surface of the outer pane is convex. In principle, the windshield can also be flat.

The windshield can be manufactured using methods known per se. A layer stack is created by arranging the individual components (outer pane, film(s) of the intermediate layer, inner pane) on top of one another in the required order. This stack of layers is then laminated into a composite pane. This is done in particular by processes known per se, for example by autoclave processes, vacuum bag processes, vacuum ring processes, calender processes, vacuum laminators or combinations thereof. The connection between the outer pane and the inner pane via the intermediate layer usually takes place under the influence of heat, vacuum and/or pressure.

If the reflection layer is a coating on the outer pane or the inner pane, this coating is preferably applied to the respective pane surface by physical vapor deposition (PVD), particularly preferably by cathode sputtering (“sputtering”), very particularly preferably by magnetic field-assisted cathode sputtering (“magnetron sputtering”) . In principle, the coatings can also be applied, for example, by means of chemical vapor deposition (CVD), for example plasma-assisted vapor deposition (PECVD), by vapor deposition or by atomic layer deposition (ALD). The reflection layer is preferably applied to the surface of the pane before the panes are connected to form the composite pane (lamination).

If, on the other hand, the reflection layer is provided as a reflection film (metal-containing or purely dielectric coating on a carrier film or purely dielectric polymer film), it is arranged between two thermoplastic connecting layers and forms the intermediate layer with them. The connecting layers are preferably each in the form of at least one thermoplastic connecting film (in particular PVB film). provided. The reflection films can usually be purchased, for example as a PET carrier film with an electrically conductive coating or as a purely dielectric reflection film with different individual layers, which alternately have a higher and a lower refractive index. They can be produced by depositing an electrically conductive coating or purely dielectric coating on a PET carrier film, in particular using the thin-film coating processes mentioned above, or by coextrusion or multiextrusion of two materials with different refractive indexes to form a purely dielectric reflection film.

If the microlamella film is to be stored in the windshield, it is also arranged at the desired position in the layer stack intended for lamination. Alternatively, the microlamella film is attached to the interior surface of the inner pane (preferably after lamination), for example glued, attached to the screen, for example glued, provided on a transparent screen, which is then positioned in the beam path between the screen and windshield, or during production of the screen integrated into it.

The masking area can be formed by applying an opaque enamel printing ink to a surface of the panes, in particular the interior surface of the outer pane, in particular by means of a screen printing process. The enamel ink is then baked into the disc surface, forming an opaque masking print that forms the masking area. Alternatively, the masking area can be formed by an opaque polymeric film. In this case, one of the connection layers is not formed by a single homogeneous connection film, but is composed of a section of an opaque connection film and a section of a transparent connection film. The connecting layer with the opaque connecting film is arranged between the reflection layer and the outer pane. If the masking area (or at least part of it) is formed by a functional element with electrically switchable optical properties, the layer system required for this is either applied to one of the surfaces of the outer pane or the inner pane before lamination or the functional element is provided as a prefabricated multi-layer film and before inserted between two connecting layers during lamination.

If the windshield is to be curved, the outer pane and the inner pane are preferred before lamination and preferably after any coating processes Subjected to bending process to bring them into a cylindrical or spherical curved shape. The outer pane and the inner pane are preferably bent congruently together (ie at the same time and using the same tool), because this means that the shape of the panes is optimally coordinated with one another for the subsequent lamination. Typical temperatures for glass bending processes are, for example, 500°C to 700°C. At these temperatures, the glass panes become plastically deformable and can be brought into the desired shape using known bending processes, for example gravity bending, press bending, suction bending or combinations thereof.

The invention also includes a vehicle which has a driver's seat and a passenger seat and which is equipped with a display system according to the invention. The windshield of the vehicle is used as a projection surface of the display system and is irradiated by at least one screen, with a microlamella film being arranged in the beam path of the screen.

The driver's seat and the passenger seat are in particular arranged next to each other behind the windshield. The windshield can be imaginarily divided into two halves by a central dividing line that runs between the top edge and bottom edge. Then one half is assigned to the driver's seat and is arranged in front of the driver's seat (in the direction of travel), while the other half is assigned to the passenger seat and is arranged in front of the passenger seat (in the direction of travel). If the driver and front passenger look straight ahead in the direction of travel, each looks through the half of the windshield assigned to them.

In an advantageous embodiment, the display area according to the invention is assigned to the front passenger and is arranged in front of the front passenger seat. This means that the screen according to the invention, in whose beam path the microlamella film is arranged, is intended to generate a display for the passenger. The associated display area is therefore arranged in that half of the windshield that is assigned to the passenger seat and is arranged on the side of the passenger seat. The advantages of the display system according to the invention are particularly advantageous: the passenger can use the display system (for example to display entertainment content) without the driver being distracted or disturbed. The angular range of the display image defined by the microlamella film is selected in particular such that the display of the display area is not perceptible from the driver's seat.

Several display areas can also be assigned to the front passenger and arranged in front of the front passenger seat, each of which is illuminated by its own screen. In this case, all displays assigned to the passenger are preferably designed according to the invention, with the microlamella film in the beam path of each screen.

In one embodiment of the invention, (at least) one further display area is present, which is assigned to the driver and is arranged in front of the driver's seat. A further screen is directed towards this further display area in order to generate a display image by reflection on a reflection layer.

The display assigned to the driver can in principle also be designed according to the invention with the microlamellar film in the beam path of the screen. However, since disruption to the passenger by the driver's display is less critical, it may be preferred that no microlamella film is used. This simplifies production and makes it more cost-effective.

Several display areas can also be assigned to the driver and arranged in front of the driver's seat, each of which is illuminated by its own screen. A microlamella film can be arranged in the beam path of all screens or a microlamella film can be arranged in the beam path of some screens, while no microlamella film is arranged in the beam path of other screens or a microlamella film cannot be arranged in the beam path of any screen.

Entertainment content is preferably displayed in the display area or areas assigned to the passenger, for example a television program, videos, computer games or Internet data. In the display area or the display areas that are assigned to the driver, status information is preferably displayed that was previously typically displayed in the area of the dashboard, such as the time, driving speed, engine speed, coolant temperature, interior or exterior temperature, information from the entertainment system (such as the radio station currently in use) or information from a navigation system. The image from one or more rear-facing cameras can also be displayed to the driver in order to achieve the classic To supplement or replace exterior mirrors or rearview mirrors. The advantage of displaying this information in the masking area of the windshield is that the driver does not have to look as far away from the actual field of vision as with conventional displays, which is advantageous for safety and ergonomic reasons. With semi-autonomous driving, the driver can take control of the vehicle more quickly.

A more flexible human-machine interface is provided, in which the user can, for example, determine the position of the individual displays themselves. The semi-virtual display image allows the eyes to refocus more quickly on the road. Additionally, the presentation is aesthetically pleasing.

The invention is explained in more detail below using a drawing and exemplary embodiments. The drawing is a schematic representation and not to scale. The drawing does not limit the invention in any way.

Show it:

1 shows a top view of a windshield of a display system according to the invention in a vehicle,

2 shows a cross section through a display system according to the invention with the windshield from FIG. 1,

3 shows a cross section through the windshield from FIG. 1,

4 shows a cross section through a further embodiment of the display system according to the invention,

5 shows a cross section through another windshield of a display system according to the invention,

6 shows a cross section through another windshield of a display system according to the invention,

7 shows a cross section through the screen of a display system according to the invention without and with microlamella film,

Fig. 8 shows a cross section through a further embodiment of the screen of a display system according to the invention.

Figure 1, Figure 2 and Figure 3 each show a detail of a display system according to the invention in a vehicle. The display system consists of a windshield 10 and a screen 20. Figure 1 shows a top view of the windshield 10, Figure 2 shows a cross section through the display system along the section line XX 'marked in Figure 1 and Figure 3 shows a cross section through the windshield 10 along the same Cutting line with a larger number of details.

The windshield 10 is installed in a vehicle, in particular a passenger car. Figure 1 also shows a view of the windshield 10 from the interior of the vehicle. The vehicle is equipped with a driver's seat and a passenger seat. The driver's seat is arranged behind the left half of the windshield 10 in the illustration, the passenger seat behind the right half. It is therefore a so-called left-hand drive vehicle for right-hand traffic, as described below is common in continental Europe and the USA, among others. The left half of the windshield 10 is assigned to the driver and is located in front of the driver's seat, the right half is assigned to the passenger and is located in front of the passenger seat.

The windshield 10 has an opaque masking area M, which is arranged in a peripheral edge area and surrounds a transparent viewing area D in a frame-like manner. The windshield 10 has an upper edge O pointing upwards (in the direction of the vehicle roof) and a lower edge U pointing downwards (in the direction of the engine compartment) and two side edges running between them. Such masking areas M are common in vehicle windows - they serve to protect the adhesive used to bond the windshield 10 to the vehicle body from UV radiation. In addition, any electrical connections or the side edge of an embedded functional film can be hidden in the masking area M.

The windshield 10 has, for example, two display areas A, B. Both display areas A, B are arranged in the section of the masking area M bordering the lower edge U. The display area A is assigned to the passenger F and is arranged in the half of the windshield 10 in front of him. It is intended to display a display for the passenger F. This can in particular be entertainment content, such as films, internet data or computer games. The display area B is assigned to the driver and is arranged in the half of the windshield 10 in front of him. It is intended to display a display for the driver. This can in particular be status information about the vehicle (e.g. driving speed), navigation instructions or the image from a rear-facing camera.

To generate the display, a screen 20 is directed at the display area A and irradiates it. Likewise, the display area B is irradiated by another screen, not shown. The aim of the invention is to implement the display in the display area A in such a way that the driver is not disturbed by it. For this purpose, a microlamella film 9 is attached to the screen. The microlamellar film 9 lies in the beam path of the screen 20, between the screen 20 and the windshield 10. The microlamellar film 9 limits the lateral angular range of the light emitted by the screen 20. This in turn limits the viewing angle of the display: the viewer must not be positioned too far to the side of the display area A when viewing the display want to recognize. The driver, who is clearly offset to the side, cannot see the display in display area A due to the limited angular range and is therefore not disturbed or distracted by it.

The display area B can also be irradiated according to the invention using a microlamella film 9 in the beam path of the screen. Then the passenger cannot see the driver's display. However, since a disturbance to the passenger is less critical, the microlamella film 9 for the display area B can be dispensed with.

The windshield 10 is constructed from an outer pane 1 and an inner pane 2, which are connected to one another via a thermoplastic intermediate layer 3. In the installed position, the outer pane 1 faces the external environment, the inner pane 2 faces the vehicle interior. The windshield 10 is shown flat for the sake of simplicity, although vehicle windows are usually curved, which is also preferred in the context of the present invention. The outer pane 1 and the inner pane 2 are made of soda lime glass. The outer pane 1 has, for example, a thickness of 2.1 mm, the inner pane 2 has a thickness of 1.6 mm.

The masking area M is formed by a black masking print 8, which is applied to the interior surface of the outer pane 1 facing the intermediate layer 3. Such a cover print 8 is generally common in the vehicle sector: an enamel color is printed onto the window surface using screen printing. It contains a black pigment and glass frits, which are burned into the surface of the pane.

The intermediate layer 3 has a multi-layer structure. It has an outer connecting layer 5, which faces the outer pane 1, and an inner connecting layer 6, which faces the inner pane 2. The connecting layers 5, 6 are transparent and made from commercially available PVB films, which also contain plasticizers. The outer connecting layer 5 has a thickness of 0.76 mm, the inner connecting layer 6 has a thickness of 0.38 mm.

A reflection layer 4, which is designed as a reflection film, is arranged between the connecting layers 5, 6. The reflection layer 4 is therefore connected to the outer pane 1 via the outer connection layer 5 and to the inner pane 2 via the inner connection layer e. The reflection layer 4 is on the lower edge U adjacent section of the masking area M arranged such that it covers both display areas A, B.

The screen 20 is, for example, an LCD screen comprising an LCD display element with a backlight. The screen 20 is arranged on the interior side of the windshield 10. The inner pane 2 of the windshield 10 therefore faces the screen 20. The screen 20 irradiates the display area A to generate the display image. The radiation from the screen 20 that hits the windshield 10 is essentially purely p-polarized. This is achieved, for example, by arranging a polarization filter (not shown) between the screen 20 and the windshield 10. Since the screen 20 irradiates the windshield 10 with an angle of incidence of approximately 65 °, which is close to the Brewster angle, the radiation from the screen 20 is only slightly reflected on the interior surface of the windshield 10 facing away from the intermediate layer 3. The light from the screen 20 is essentially only reflected on the reflection layer 4, so that a clear display image is generated without disturbing ghost images, which the viewer, in this case the passenger F, can perceive.

The reflection layer 4 is, for example, a purely dielectric reflection film, which is each made up of a sequence of polymeric dielectric individual layers, the individual layers alternatingly having a higher and a lower refractive index. Due to interference, the reflection films have reflective properties, in particular with respect to the radiation from the screen 20.

Figure 4 shows a cross section through a further embodiment of the display system according to the invention. The windshield 10 and the screen 20 are designed in the same way as in the embodiment of Figures 1 to 3. The difference lies in the positioning of the microlamella film 9. The microlamella film 9 is also arranged in the beam path of the screen 20 between the screen 20 and the windshield 10. However, it is not applied directly to the screen, but rather to a transparent screen 7, for example a flat support plate made of PMMA or glass. The screen 7 with the microlamella film 9 is arranged between the screen 20 and the windshield 10. The screen 7 can, for example, be attached in a pivotable, sliding or folding manner, so that it can be pivoted, pushed or folded into the beam path of the screen 20 and out again. This allows the user to choose whether he wants to operate the display system with a restricted angular range or with an unrestricted angular range. The driver can choose whether he wants to recognize the passenger's display or not. The restricted angle range can, for example, be selected selectively in critical situations or when the passenger is presenting particularly distracting content.

Figure 5 shows a cross section through another windshield 10, which can be used for a display system according to the invention. The outer pane 1 with the covering pressure 8 and the inner pane 2 are designed in the same way as in the example in the figure

3. The intermediate layer 3 has only a single connecting layer, which is formed from, for example, a PVB film with a thickness of 0.76 mm. The reflection layer 4 is applied to the outside surface of the inner pane 2 facing the intermediate layer 3. The reflection layer 4 is, for example, a sputtered-on thin-film coating which comprises at least one silver layer in addition to dielectric layers.

The microlamella film 9 is attached, for example glued, to the interior surface of the inner pane facing away from the intermediate layer 3. In this way, too, it is in the beam path between the screen 20 and the reflection layer

4, in particular arranged between the screen 20 and the windshield 10 and suitable for laterally limiting the angular range of the display. A further microlamellar film away from the windshield 10, for example directly on the screen 20 as in Figure 2 or on a transparent screen 7 as in Figure 4, is not necessary and therefore not present.

Figure 6 shows a cross section through another windshield 10, which can be used for a display system according to the invention. The outer pane 1 with the covering print 8, the inner pane 2, the outer connecting layer 6 and the inner connecting layer 6 are designed in the same way as in the example in FIG arranged. The microlamella film 9 faces the inner pane 2 and the reflection layer 4 faces the outer pane 1. In this way, too, it is arranged in the beam path between the screen 20 and the reflection layer 4 and is suitable for laterally limiting the angular range of the display. A further microlamella film away from the windshield 10, for example directly on the screen 20 as in Figure 2 or on a transparent screen 7 as in Figure 4, is not necessary here either and is therefore not present. The reflection layer 4 is, for example, one Thin-film coating, which comprises at least one silver layer in addition to dielectric layers and which is applied to a PET carrier film.

The configurations described above are only to be understood as examples and do not limit the invention. The positioning of the microlamella film 9 from one embodiment can be combined with the formation of the reflection layer 4 from other embodiments. The reflection layer 4 can have partially reflective properties with respect to the light from the screen 20 or can be designed in the manner of a mirror and reflect essentially all of the radiation. The reflection layer 4 can also be applied to the interior surface of the inner pane 2 facing away from the intermediate layer 3, for example as a sputtered dielectric thin layer based on titanium oxide, with the microlamella film 9 directly on the reflection layer 4, directly on the screen 20 or on a transparent Screen 7 is arranged between screen 20 and windshield 10.

figure? shows cross sections through the screen 20 of a display system according to the invention and illustrates the angular range of the emitted light. The cross-sectional view shows a section through the component of the emitted light that irradiates the windshield 10 along a horizontal line between its side edges. This radiation component is therefore also referred to as the horizontal component. The lateral angular ranges of the emitted light are shown, based on a situation in which the observers look at the interior surface of the inner pane in the installed position, as intended. The lateral angle range determines the extent to which a viewer can deviate laterally from the actually intended viewer position (directly in front of the display area 4) and still recognize the display. The angular range is determined as the angle between the peripheral rays, which laterally limit the ray cone emanating from a point in the horizontal component, and the surface normal at the said point.

The screen 20 itself has a certain angular range β2 (FIG. 7a). As a rule, this is an angular range β2 that is so large that the driver can still recognize the display from the front passenger F's display area 4. This can cause the driver to be distracted. The microlamella film 9 according to the invention, which in the embodiment shown is applied directly to the screen 20, achieves a restricted angular range ßi, which is smaller than the angular range ß2. The angular range ßi is selected such that the driver can no longer recognize the display from the front passenger F's display area 4.

The angular range of the light emanating from the display area 4 and reflected on the windshield 10 is crucial for the invention. The microlamella film 9 therefore does not have to be applied directly to the screen 20, but rather at any point in the beam path of the screen 20. This refers in particular to the “external” beam path of the light emitted by the screen 20 between the screen 20 and the reflection layer 4.

Figure 8 shows a cross section through a further embodiment of the screen 20. The screen 20, as in the embodiments of the invention shown above, is constructed from a flat background lighting 21 and a transmissive imager 23. These elements are arranged flat one above the other, with the imager 23 the windshield 10 faces

The imager 23 is an LCD panel which is illuminated by the backlight 21. The background lighting 21 is, for example, an electroluminescent film or a light guide plate, over the side edge of which light is coupled in with a plurality of LEDs and which is equipped with decoupling means such as light-scattering structures which are suitable for decoupling the light again at least partially via the main surface facing the imager 23.

In this embodiment, the microlamella film 9 is arranged in the internal beam path of the screen 20, between the backlight 21 and the imager 23. The angular range βi of the screen 20 can also be limited in this way.

The screen can contain further components (not shown), for example components for beam shaping (such as collimators and/or diffusers) or optical filters (in particular interference coatings) or other coatings (for example anti-reflection coatings). List of reference symbols:

(10) Windshield

(1) Outer pane

(2) Inner pane

(3) thermoplastic interlayer

(4) Reflective layer

(5) outer connecting layer of intermediate layer 3

(6) inner connecting layer of intermediate layer 3

(7) transparent screen

(8) Cover pressure

(9) Microlamella film

(20) Screen

(21) flat backlighting of the screen 20

(23) 20 screen transmissive imager

(F) Viewer/Passenger

(M) Windshield masking area 10

(D) Visibility area of the windshield 10

(A) Windshield display area 10 (with two modes)

(B) further display area of the windshield 10 (with one operating mode)

(O) Top edge of windshield 10

(U) Lower edge of windshield 10

(ßi) Angular range of the screen 20 (when using the microlamella film 9)

(ß ₂ ) Angular range of the screen 20 (without the microlamella film 9)

X-X' cutting line

Claims

Claims Display system for a vehicle, comprising

- a windshield (10) with a transparent viewing area (D) and an opaque masking area (M) and

- a screen (20) which is directed at a display area (A) arranged in the masking area (M), the windshield (10) in the display area (A) being equipped with a reflection layer (4) which is suitable for reflecting the radiation of the Screen (20) to reflect to generate a display image, and wherein a microlamella film (9) is arranged in the beam path of the screen (20). Display system according to claim 1, wherein the microlamella film (9) is suitable for restricting the lateral angular range (ßi) of the display image. Display system according to claim 1 or 2, wherein the micro-lamella film (9) is arranged such that the projection of the slats of the micro-lamella film (9) onto the windshield (10) is substantially vertical between an upper edge (O) and a lower edge (U) of the windshield (10) runs. Display system according to one of claims 1 to 3, wherein the microlamella film (9) is arranged between the screen (20) and the reflection layer (4), preferably: between the screen (20) and the windshield (10), particularly preferably directly on the screen (20). Display system according to claim 4, wherein the microlamella film (9) is mounted in such a way that it can be moved into and out of the beam path of the screen (20), preferably on a transparent screen (7), which is mounted in a foldable, sliding or pivotable manner . Display system according to one of claims 1 to 3, wherein the screen (20) comprises a flat backlight (21) and a transmissive imager (23), and wherein the microlamella film (9) lies between the flat backlight (21) and the transmissive imager (23 ) is arranged. Display system according to one of claims 1 to 6, wherein the reflection layer (4) is designed as

- metal-containing coating or

- purely dielectric coating or

- purely dielectric polymer film, which contains alternating individual layers with different refractive indexes. Display system according to one of claims 1 to 7, wherein the masking area (M) is formed

- by a cover print (8)

- through an opaque polymeric film as part of the intermediate layer (3) and/or

- by a functional element with electrically controllable properties, in particular an electrochromic functional element. Display system according to one of claims 1 to 8, wherein the display area (B) is arranged in a section of the masking area (M) adjacent to a lower edge (U) of the windshield (10). Display system according to one of claims 1 to 9, wherein the radiation from the screen (20) striking the windshield (10) is p-polarized. Display system according to one of claims 1 to 10, wherein the windshield (10) is a composite pane consisting of an outer pane (1) and an inner pane (2), which are connected to one another via a thermoplastic intermediate layer (3). Vehicle with a driver's seat and a passenger seat, equipped with a display system according to one of claims 1 to 11. Vehicle according to claim 12, wherein the display area (A) is arranged in that half of the windshield (10) which is located on the side of the passenger seat . Vehicle according to claim 13, wherein the angular range (ßi) is selected such that the display of the display area (A) is not perceptible from the driver's seat.