DE102022124544A1 - System and method for providing visual content to a vehicle - Google Patents

Abstract

A system (10) and a method are used to provide visual content (32) in a vehicle (12), in particular visual content (32) that can be perceived from outside or inside the vehicle (12). The system (10) has at least one image surface (30), which is formed by an actively luminous emitter substrate (92) which is attached to or in a vehicle window (16), a contrast film (126) designed as a switchable film and a control device ( 70), which includes at least one display image control (96) and a contrast film control (98). The emitter substrate (92) has a front side (110), a back side (112) and a pixel matrix (94) for displaying pixel-based images. The emitter substrate (92) is designed to display an image visible from outside or inside the vehicle (12) on the front (110) in an active mode. The display image control (96) is designed to control the emitter substrate (92) to display visual content (32). The contrast film control (98) influences a degree of tint of the contrast film (126) depending on a brightness parameter.

Description

The present disclosure relates to a system and a method for providing visual content in a vehicle. In particular, the present disclosure relates to a system and a method for displaying visual content perceptible outside or inside the vehicle.

In principle, the visual content can be entertainment, news, advertising, information, (disaster) warnings and the like. The visual content can also be traffic-related content, such as traffic jam reports, danger reports, information about parking availability, information about planned parking duration and the like. The visual content can in principle also be vehicle-specific content, such as information about the charge level, a welcome function (greeting the driver), a coming home function (farewell to the driver) and the like. If the vehicle is intended for temporary use (taxi, rental vehicle, car sharing vehicle, etc.), the visual content can also include information about availability and the like. The visual content can also include a combination of different content.

From the DE 202 12 462 U1 is a system built into a vehicle for projecting images, graphics and texts, whereby visibility is provided from the outside, for example via the rear window of the vehicle. A roller blind is used as a projection surface, which can be extended in front of the rear window in the interior of the vehicle. From the FR 2 824 172 A1 A system for displaying information in the rear window of a vehicle is known, whereby an active liquid crystal film suitable for color representation is used as a display.

From the US 2019/0098268 A1 a mobile projection system is known which comprises a hermetically sealed unit which is attached to the vehicle headliner in the interior of a vehicle, the projection taking place, for example, in the side windows of the vehicle. The US 2019/0098268 A1 further describes an embedding of the mobile projection system in a client-server environment, with content to be displayed being provided via a server.

In an urban environment, for example, vehicles parked in public spaces are generally visible to a majority or large number of passers-by and other road users. Vehicles are used, for example, for advertising purposes by applying (static) advertising messages or other content to the vehicle body and then making them visible to passers-by and other road users. The contents are also visible when the vehicle is moving. However, the content is static (static images, no video, no possibility of dynamic control). Furthermore, due to their permanent presence, such advertising media sometimes have acceptance problems among passers-by and users (in the case of rental vehicles, car sharing and the like).

Parked vehicles can be used to display visual content to the extent that the vehicle's windows are generally available for display when parked. In a moving vehicle, the vehicle windows should be at least sufficiently transparent for reasons of traffic safety. However, since vehicles are often stationary in urban environments, parked vehicles can generally be used for the purposes mentioned above. However, this should be possible without adverse effects on traffic safety when driving the vehicle.

Against this background, the present disclosure is based on the object of specifying a system and a method for providing visual content in a vehicle, in particular visual content that can be perceived from outside or inside the vehicle via its vehicle windows, wherein the system addresses passers-by with the displayable visual content when the vehicle is stationary and attracts attention. When the vehicle is moving, the system should be as unobtrusive as possible and in particular should not have any adverse effect on road safety in the vehicle. The system should allow the display of dynamic content. The system should ensure good visibility of the visual content even under unfavorable environmental conditions (for example direct sunlight with high brightness, operation at dusk or at night). The system should be particularly suitable for displaying interactive content, for example when observed by passers-by with the aid of their mobile devices (for example smartphones). Furthermore, the system should allow dynamic control of the displayed content.

• - zumindest eine Bildfläche, die durch ein aktiv leuchtfähiges Emittersubstrat gebildet ist, das auf oder in einer Fahrzeugscheibe angebracht ist, wobei das Emittersubstrat eine Vorderseite, eine Rückseite und eine Pixelmatrix zur Darstellung pixelbasierter Bilder aufweist, wobei das Emittersubstrat dazu ausgebildet ist, in einem aktiven Modus an der Vorderseite ein von außerhalb oder innerhalb des Fahrzeugs sichtbares Bild anzuzeigen,
• - eine als schaltbare Folie gestaltete Kontrastfolie, insbesondere an der Rückseite des Emittersubstrats, und
• - eine Steuereinrichtung, die zumindest eine Anzeigebildsteuerung und eine Kontrastfoliensteuerung umfasst,

wobei die Anzeigebildsteuerung zur Ansteuerung des Emittersubstrats zur Darstellung von visuellem Inhalt ausgebildet ist, und
wobei die Kontrastfoliensteuerung einen Tönungsgrad der Kontrastfolie beeinflusst, insbesondere in Abhängigkeit von einem Helligkeitsparameter.According to a first aspect, the present disclosure relates to a system for providing visual content in a vehicle, in particular visual content that can be perceived from outside or inside the vehicle via its vehicle windows, the system having the following:

• - at least one image surface which is formed by an actively luminous emitter substrate which is mounted on or in a vehicle window, the emitter substrate having a front side, a back side and a pixel matrix for displaying pixel-based images, the emitter substrate being designed to be in an active mode to display an image visible from outside or inside the vehicle on the front,
• - a contrast film designed as a switchable film, in particular on the back of the emitter substrate, and
• - a control device which includes at least a display image control and a contrast foil control,

wherein the display image controller is designed to control the emitter substrate to display visual content, and
wherein the contrast film control influences a degree of tint of the contrast film, in particular depending on a brightness parameter.

• - Bereitstellung einer Fahrzeugscheibe mit einer darauf oder darin angebrachten Bildfläche, die durch ein aktiv leuchtfähiges Emittersubstrat gebildet ist, wobei das Emittersubstrat eine Vorderseite, eine Rückseite und eine Pixelmatrix zur Darstellung pixelbasierter Bilder aufweist und dazu ausgebildet ist, in einem aktiven Modus an der Vorderseite ein von außerhalb oder innerhalb des Fahrzeugs sichtbares Bild anzuzeigen, sowie mit einer als schaltbare Folie gestalteten Kontrastfolie, insbesondere an der Rückseite des Emittersubstrats,
• - Bereitstellung einer Steuereinrichtung, die zumindest eine Anzeigebildsteuerung und eine Kontrastfoliensteuerung umfasst,
• - Beaufschlagen der Kontrastfolie mit einer Steuerspannung durch die Kontrastfoliensteuerung, um einen Tönungsgrad der Kontrastfolie zu beeinflussen, insbesondere in Abhängigkeit von einem Helligkeitsparameter, und
• - Betreiben des Emittersubstrats mit der Anzeigebildsteuerung zur Darstellung von visuellem Inhalt auf der Bildfläche durch das Emittersubstrat.

According to a further aspect, the present disclosure relates to a method for providing visual content in a vehicle, in particular visual content perceptible from outside or inside the vehicle via its vehicle windows, comprising the following steps:

• - Provision of a vehicle window with an image surface mounted thereon or therein, which is formed by an actively luminous emitter substrate, wherein the emitter substrate has a front side, a back side and a pixel matrix for displaying pixel-based images and is designed to display an image visible from outside or inside the vehicle on the front side in an active mode, and with a contrast film designed as a switchable film, in particular on the back side of the emitter substrate,
• - Provision of a control device comprising at least a display image control and a contrast film control,
• - applying a control voltage to the contrast film by the contrast film control in order to influence a degree of tinting of the contrast film, in particular depending on a brightness parameter, and
• - Operating the emitter substrate with the display image control to display visual content on the display surface through the emitter substrate.

In this way, the vehicle window can be operated in a mode with high transparency (transparency mode), which is particularly suitable for driving the vehicle. The inactive mode can therefore also be referred to as transparency mode. There is a high level of transparency while driving, so that traffic safety is maintained. Conversely, when the vehicle is stationary (parked vehicle), there is a display on the screen that is easily visible to passers-by and is generated by the luminous emitter substrate in the vehicle window.

In exemplary embodiments, the emitter substrate has a high level of transparency, at least in an inactive mode. In other words, the emitter substrate is sufficiently transparent to the human eye, at least in the inactive mode when no visual content is being displayed. On the one hand, the emitter substrate is at least sufficiently transparent when viewed from the vehicle interior. Furthermore, the emitter substrate is at least sufficiently transparent when viewed from the outside (e.g. by passers-by). Depending on the direction (from the inside to the outside or from the outside to the inside), different degrees of transparency can be given. Furthermore, different degrees of transparency can be present in the active mode and in the inactive mode.

So that high image quality with good contrast (brightness contrast and/or color contrast) can be achieved even with an emitter substrate that is at least sufficiently transparent, the contrast film is provided in addition to the emitter substrate. The contrast film can be operated in such a way that in the active state of the system, when visual content of the vehicle window is displayed, a strong tint (high degree of tint) is provided. This provides a dark background, not through the emitter substrate, but through the contrast film. The desired optimal visibility - under given conditions - can in principle also be achieved by a higher degree of tint. In this way, potentially disturbing brightness in the interior of the vehicle that is not caused by the projection unit can be specifically “locked out”. The image created in the emitter substrate becomes more visible.

In the inactive mode, the contrast film can also be placed in a state with at least sufficient transparency, for example in a state with the maximum possible transparency for the contrast film. Overall, this ensures a high level of transparency for the vehicle window.

If in the context of the present disclosure it is mentioned that a film is applied to the vehicle window, this includes films that are applied to a glass substrate and films that are otherwise integrated or even embedded in a window.

The contrast film serves to increase the contrast and thus to improve the image quality. In this way, the perceptibility of the information displayed can be further improved, for example in daylight. From the perspective of a passer-by looking at the image from outside the vehicle, the contrast film can provide a suitable background for the display.

In principle, the vehicle can be a passenger car (passenger car). Vehicles are usually used to transport people and/or goods. Basically, the term vehicle refers to land vehicles, watercraft and aircraft. Land vehicles include, for example, road vehicles and rail vehicles. Watercraft include ships. Aircraft include airplanes, helicopters, balloons and airships. Vehicles are used, for example, for motorized individual transport, such as private cars or the like. In principle, rental vehicles, car sharing vehicles and taxis also belong to motorized individual transport. Vehicles can have a human driver/guide, but there are also autonomously controlled vehicles. Vehicles can also be vehicles for public or private (not individual) transport; this generally includes the categories of land vehicles, watercraft and aircraft. Typical land vehicles for non-individual transport are buses and trains. Typical watercraft for non-individual transport are ferries. Typical aircraft for non-individual transport are commercial aircraft.

In the context of the present disclosure, focus is primarily on vehicles that have vehicle windows that are used at least temporarily to view the outside from the vehicle interior. An essential aspect of the present disclosure is the use of such vehicle windows as image surfaces for displaying visual content that can be perceived from the outside (outside the vehicle) or inside (inside the vehicle).

The image area is the area that is basically available for the display, i.e. on which the emitter substrate can produce an image. The image area can cover the entire surface of the vehicle window. However, it is also conceivable to use a subset of the surface of the vehicle window as the image area. The control device can be designed as a distributed control device or as a centralized control device. The system can be integrated into a vehicle, with the necessary components being placed inconspicuously. In particular, when the system is inactive, it is barely noticeable from the outside by passers-by and other road users. This increases acceptance in urban areas.

The emitter substrate is usually designed as a flat emitter substrate. The emitter substrate provides an image area that is, for example, rectangular, square, trapezoidal, square and/or otherwise shaped. The emitter substrate is actively luminous, i.e. self-emitting. By way of example, the emitter substrate comprises a matrix of organic light-emitting diodes (OLED). The matrix can be embedded in a partially transparent substrate, such as a film or (thin) glass. The emitter substrate comprises a pixel matrix, i.e. an array of a large number of luminous individual elements. In exemplary embodiments, the emitter substrate is suitable for color representation. On the one hand, this can include the use of different colored subpixels within a pixel. Furthermore, this can also include the use of specific color filters per pixel, so that specific colors (wavelength ranges) can be selected based on broadband light (for example white light).

It is understood that the system according to the disclosure and the method according to the disclosure can be equally developed and designed. Features described above and below can therefore be used both within the framework of the system according to the disclosure and within the framework of the method according to the disclosure.

According to an exemplary embodiment, the luminous emitter substrate is part of a TOLED film or a TOLED glass. In this way, no backlighting is required. The system can be integrated unobtrusively into the vehicle. This applies to viewing from the outside by passers-by, but also to the interior of the vehicle. The luminous emitter substrate makes it possible to avoid, for example, installations for projectors and the like that require corresponding space in the interior. The emitter substrate can basically be designed as a film-based (with carrier film) or glass-based (with carrier glass). The thickness of the vehicle window is only insignificantly affected. The term TOLED refers to a transparent OLED substrate. One advantage of this design is that at least in the inactive mode (also: transparent mode) there is a sufficiently high level of transparency, for example a transmission level of at least 70% is ensured. The high level of transparency can generally be achieved in both directions (from the inside to the outside and from the outside to the inside). In combination with the contrast film, a high contrast is also ensured when viewed from the outside when the system is actively operated.

According to a further exemplary embodiment, the emitter substrate is part of a TOLED film, the TOLED film being applied to a vehicle window that is curved in several axes. Creating the necessary luminous structures on a film allows for sufficiently good deformability. In this way, the application in the vehicle is simplified. The TOLED film can be applied to a disk that is curved in several axes. A disk curved in several axes is not just a cylinder section. Instead, a disk curved in several axes can have spherical surfaces, which are dictated by the vehicle design, for example.

In an exemplary embodiment, TOLED film allows the displayed image to be dispensed with digital pre-distortion. This can be done, for example, by uniformly adapting a given pixel matrix of the TOLED film to a given curvature of the vehicle window during production or assembly, due to the good deformability of the TOLED film. A uniform distribution of the pixels on the given curved image surface makes any measures for pre-distorting the image due to the curvature of the pane unnecessary, at least in exemplary embodiments.

According to a further exemplary embodiment, the emitter substrate has a transmittance of at least 70%, at least in an inactive (transparent) mode. According to a further exemplary embodiment, the emitter substrate in the inactive mode has a transmittance of at least 80%, more preferably of at least 90%. In this way, there is a high level of transparency when the system is deactivated, so that traffic safety is not impaired.

According to a further exemplary embodiment, the emitter substrate has a transmittance of at least 70% even in active mode when viewed from the rear from the vehicle. According to this embodiment, there is at least sufficient transparency even in active mode. A good view of traffic from inside to outside is guaranteed. In active mode, the contrast film may be used to increase the contrast when viewing from outside.

A total transmittance over the entire vehicle window may possibly be slightly lower. This is due, for example, to the contrast film and any permanent tinting of the vehicle window.

According to a further exemplary embodiment, at least one brightness sensor is also provided, which is installed in particular close to the window or integrated into the vehicle window, the control device using a signal provided by the brightness sensor as a brightness parameter. In this way, the control device can take into account at least one brightness parameter when operating the system, which is provided by a brightness sensor near the pane or integrated into the pane. This can increase image quality in different lighting conditions.

This has the advantage that the light intensity of the luminous emitter substrate can be adjusted to the current brightness. For example, in the dark, the light intensity can be reduced. When it is bright, the light intensity can be increased accordingly to ensure good visibility. Overall, energy consumption can also be influenced favorably. A brightness sensor integrated into the screen or close to the screen measures very close to the image area used for the display. In this way, for example, a distinction can be made between a shady side and a sunny side of the vehicle. This can help maintain optimal visibility of the visual content.

In an exemplary embodiment, the at least one brightness sensor is integrated into the emitter substrate or a film provided therewith. Alternatively or in addition to the brightness sensor, a time-of-day (astronomical) and/or weather-dependent (sunshine, overcast sky) control is basically conceivable. Corresponding information can be made available to the control device. The at least one brightness parameter can be used by the contrast film control and the display image control.

According to another exemplary embodiment, the contrast film is designed as an electrochromic film. An electrochromic film uses the property of electrochromic materials to change the light transmission depending on the applied voltage (usually direct voltage). By changing the polarity of the voltage, this effect can be reversed. The contrast film can therefore be switched between a darkened state (low transparency) and a darkened state (low light transmission). difference) and a state of high transparency. Intermediate stages are conceivable, which can be achieved, for example, by varying the duration of the applied voltage during the switching process.

The switching speed of a contrast film designed as an electrochromic film is usually low compared to the refresh rates of the luminous emitter substrate. Switching between a high transparency state and a low transparency state typically requires at least several seconds. However, this is dynamic enough to react to changes in brightness, especially when the vehicle is parked. An advantage of the electrochromic film is that a selected and set state can be maintained with less (or no additional) energy expenditure. A current state can be kept de-energized or almost de-energized.

According to a further exemplary embodiment, the contrast film control changes the tint level of the contrast film when the emitter substrate is in an inactive mode. This may include minimizing the level of tint to ensure high transparency. This ensures a high level of transparency in inactive mode. This can be advantageous from a regulatory perspective because the system is then also suitable for vehicle windows where a high level of transparency is required during vehicle operation. These are, for example, front side windows or possibly even windshields.

According to a further exemplary embodiment, the contrast film has maximum transparency in an inactive mode, wherein furthermore the emitter substrate has maximum transparency in the inactive mode. High transparency includes, for example, a transmittance of at least 70% or at least 80%. Ideally, the system can be operated in such a way that a high level of transparency is provided in a de-energized or voltage-free state and can be maintained without further energy input.

According to a further exemplary embodiment, the contrast film control influences a degree of tint of the contrast film depending on a brightness parameter. The brightness parameter can be provided, for example, by a brightness sensor. The brightness parameter can also be selected depending on the time of day (astronomical), weather-dependent (sunshine, overcast sky) or other influencing factors.

According to a further exemplary embodiment, a voltage supply to the emitter substrate is deactivated in the inactive mode, wherein preferably a voltage supply to the contrast film is also deactivated in the inactive state. Inactive means that the emitter substrate and/or the contrast film is not subject to voltage. According to this embodiment, at least the emitter substrate has maximum transparency when no voltage is applied or the system for providing visual content is completely deactivated. This can bring regulatory advantages, as it ensures road safety through high transparency of the windows even under abnormal operating conditions. It is therefore conceivable to also use front side windows and possibly even the windshield of a vehicle to provide visual content. In the event of a defect, the respective pane is highly transparent.

According to a further exemplary embodiment, the vehicle window is a front side window or a windshield of the vehicle. In this context, it is advantageous that measures are provided to ensure a high level of transparency when the system is not active. On the one hand, this can be attributed to the use of transparent OLED films as an emitter substrate, which has a high level of transparency in the inactive state. Furthermore, the control device can specifically control the contrast film, for example in the event of a defect, in order to ensure a state of high transparency there. This can, for example, include an energy storage device which, in the event of a system failure, acts specifically on the contrast film in order to produce a change from a tinted state to a state of high transparency.

In principle, windows in the rear area (for example rear side windows, side trunk windows and rear windows) are of course also suitable as vehicle windows for the image area of the system according to the disclosure. Examples include vehicle windows behind the so-called B-pillar of a vehicle body. For these panes, it is acceptable from a regulatory perspective to have some darkening (reduced transparency) even in a non-active state. In other words, rear vehicle windows can optionally also be provided with an emitter substrate designed as an OLED film. A certain degree of transparency is also conceivable with OLED films, even if the high transparency of TOLED is not achieved. On many vehicles, a certain amount of tinting on the rear side windows and the rear window is definitely desirable, so this is not perceived as a disadvantage.

According to a further exemplary embodiment, a UV protective film is also attached to the vehicle window, in particular on the front of the emitter substrate. In an exemplary embodiment, the UV protective film is integrated into a (multi-layer) design of the emitter substrate or the film provided with it. The UV protective film usually comprises a UV-resistant material that contains UV-absorbing particles. On the one hand, the UV protective film protects vehicle occupants from excessive UV radiation (ultraviolet radiation). Furthermore, the UV protective film protects the emitter substrate and possibly the contrast film from excessive UV input. In this way, the service life of the components can be increased.

It goes without saying that the emitter substrate and, if necessary, the contrast film can be designed to be heat-reflecting (IR-reflecting). In this way, excessive heating of the vehicle interior is prevented.

It is also understood that further measures to optimize the optical properties of the vehicle window are conceivable. This includes, for example, an anti-reflective coating on the vehicle window, especially on the outside, to reduce unwanted reflections.

According to a further exemplary embodiment, the vehicle window is designed as a single pane, with at least the emitter substrate, the contrast film and in particular also the UV protective film being attached to the inside of the single pane. The films are therefore applied to the inside of the pane. It goes without saying that the single pane can still be designed as safety glass (toughened safety glass, ESG, or laminated safety glass, LSG). What is essential for this embodiment is that the usually film-based emitter substrate and possible additional films are arranged on the inside of the pane. The inside is the side facing the vehicle interior. When using a UV protective film, a TOLED film and a contrast film, the UV protective film is usually located on the outside in order to protect the TOLED film behind it and the contrast film in turn behind the TOLED film.

When using laminated safety glass (VSG), a polymer film (for example polyvinyl butyral, PVB, or ethylene-vinyl acetate, EVA) is usually arranged between at least two panes of glass. The intermediate film usually also serves as an adhesive film for the material connection of the two panes. This increases sound insulation and burglary protection. The entire pane can therefore contain additional films.

In an exemplary embodiment, in the single pane design, a protective film is applied to the inside, which covers the emitter substrate (or the TOLED film provided with it) and the contrast film. In this way, the potentially sensitive active films are well protected.

According to a further exemplary embodiment, the vehicle window is designed as a multiple pane, with at least the emitter substrate, the contrast film and in particular also the UV protective film being arranged between an outer pane and an inner pane. In other words, the films are embedded between two panes. It is usually a double pane with two panes between which the films are arranged. The at least one brightness sensor can also be arranged between the two panes. This results in good mechanical protection. The individual panes can each be designed as ESG or VSG. This does not exclude the possibility that the individual panes fulfill other optical functions, such as serving as additional sun protection.

According to a further exemplary embodiment, the system has at least one image capture unit arranged in the vehicle interior with at least one camera, the camera being directed at the emitter substrate on the vehicle window. The camera can basically be used to monitor the vehicle interior, for example in the event of manipulation, vandalism or theft. However, the camera can in principle also be used to capture a scene outside the vehicle.

If the image capture unit is used to capture an environment of the vehicle, for example to capture passers-by, the control device can be designed to clock the image capture in time or space in such a way that there is no disruptive overlap with the representation generated directly in a vehicle window. By way of example, the image capture with the at least one camera can be used through areas of the same vehicle window or another vehicle window that are not or currently not used for displaying the content. Timing can be achieved, for example, by alternating observation phases and display phases. If necessary, a control-related segmentation of the image area can also be used to specifically exclude sections of the image area from the display - at least temporarily. Such image areas are then generally available for observation with the image capture unit.

According to a further exemplary embodiment, the control device is designed to detect the presence of passers-by through the vehicle window and, based on this detection, to control at least the display image control for controlling the emitter substrate. For example, the system can be deactivated or put into an energy-saving mode if it is determined that there are no pedestrians in the area surrounding the vehicle. Conversely, the system can be activated when passers-by are present. It is also conceivable to display information only in certain vehicle windows that are currently visible to passers-by, and to leave out other vehicle windows that are currently not visible to passers-by.

Furthermore, the image capture unit with the at least one camera can also be used to track the movement of passers-by in order to specifically target those image areas that are in the potential field of vision of the passer-by in the case of several possible image areas on several vehicle windows. Furthermore, the image capture unit can also be used to capture a user reaction. In this way, for example, using facial recognition, eye tracking (pupil tracking) and the like, it can be determined whether a passer-by actively perceives the content displayed.

In principle, it is conceivable to provide several image areas in a vehicle, for example by using several vehicle windows as image areas. Accordingly, an image to be displayed can be sequenced and distributed across multiple image areas. In principle, it is also conceivable to take into account the respective viewing angle of an observer (passerby) in relation to the vehicle. For example, in the case of a passer-by who approaches a vehicle from behind, passes its side and then moves away over the front of the vehicle, this can include an adapted representation first in the rear window, then in one or more side windows and finally in the windshield.

Furthermore, the image capture unit can also be used for the purpose of providing interactive functions, for example to capture feedback from the viewer. This can be done using appropriate gestures, such as hand signals and other movements of the viewer.

According to an exemplary embodiment, the vehicle window itself is used as an input device for interactive functions. This can be done, for example, by integrating a touch film that reacts to touch and/or proximity. The touch film can be arranged behind the (outer) glass pane of the vehicle window so that good mechanical protection is guaranteed.

According to a further exemplary embodiment, the system further has at least one acceleration sensor for determining a movement parameter. For example, the acceleration sensor is integrated into the control device. In an exemplary embodiment, the acceleration sensor is integrated into a camera housing of the image capture unit. It goes without saying that several acceleration sensors can be installed.

An acceleration sensor detects movement information. The acceleration sensor can be designed, for example, as an inertia sensor and/or rotation rate sensor. With an acceleration sensor, information about acceleration, but also indirectly about position and orientation in space, can be obtained. The at least one acceleration sensor can be used for control purposes, for example to ensure that the system is (at least regularly) inactive when the vehicle is moving. It is conceivable that in the event of special traffic conditions (traffic jams, accidents, etc.) the system could also be activated when the vehicle is being used in order to display information.

However, the acceleration sensor can also be used to determine abnormal operating conditions. This includes, for example, the detection of attempted theft, attempts at manipulation, vandalism or the like. Detection of accidents (vehicle crashes) is also conceivable, whereupon corresponding warnings and information can be displayed as content.

It is understood that the system can include additional sensors, for example for satellite-based positioning (GPS). Such data may be combined with data provided by the accelerometer. On the one hand, the data can be used to expand the range of functions (localization of the displayed content), but also for security measures (no display when the vehicle is moving, theft tracking, etc.).

According to a further exemplary embodiment, the control device is designed to detect passers-by and/or vehicle occupants using the image capture unit, at least in the event of an abnormal operating state. An abnormal operating condition is, for example, an attempted manipulation, an attempted theft or vandalism. In principle, this can also happen in the event of an accident. In principle, this function can also be used for traffic monitoring purposes, Environmental monitoring and the like can be used.

According to a further exemplary embodiment, the system, in particular its control device, comprises further sensors for detecting radio networks (clients and/or access points). This can include established standards such as WiFi, Bluetooth, 3G, 4G, 5G, NFC and similar. In this way, the presence of passers-by can be determined indirectly via the presence of mobile devices; content can also be started when passers-by are present and/or ended when they are absent and/or the content can even be individually adapted to the passers-by.

According to a further exemplary embodiment, the system further has a power supply unit with a battery, which is provided in the vehicle in addition to a vehicle battery. For example, the battery of the system can be charged directly or indirectly via the battery of the vehicle or its alternator. A battery provided in addition to the vehicle battery ensures that the vehicle can be operated regardless of the battery status of the system. The energy supply unit can ensure that the battery can be replaced. It goes without saying that the energy supply unit can also be structurally integrated into the control device.

According to a further exemplary embodiment, at least the display image control or the contrast film control is coupled to the vehicle battery for energy supply. This can be advantageous from a regulatory perspective because it ensures that the film-based emitter substrate or contrast film can be supplied with energy when the vehicle is in use. Consequently, energy is available to increase the transparency of the active films when the vehicle is driving.

According to a further exemplary embodiment, the vehicle window itself is used as an energy source to provide operating energy. In this way, the battery of the energy supply unit can be charged while the system is operating but also when the system is paused. An implementation can take place, for example, using a PV film (film for flexible photovoltaics) that is attached to the vehicle window or integrated into the vehicle window.

The vehicle window can therefore have other films in addition to the TOLED film and, if necessary, the contrast film. This may be one or more films selected from the group consisting of: UV protection film, mechanical protection film, PV film, IR protection film, touch film and combinations thereof. The UV protective film is usually an outer film (towards the vehicle environment), because in this way the films behind it are protected from potentially harmful UV radiation. In an exemplary embodiment, the films with their effective wavelength ranges are coordinated with one another, so that functionality is still maintained even with several films arranged one behind the other.

According to a further exemplary embodiment, at least the projection screen control or the contrast screen control is functionally coupled to an activation system (e.g. ignition lock, starter button) and/or access system of the vehicle (e.g. keyless go system, external access software, fleet management system). This coupling can of course affect the entire control device. In this way, at least the image display in the vehicle window and, if necessary, the entire system can be deactivated when the vehicle is to be moved.

According to a further exemplary embodiment, the vehicle window is provided with an anti-reflective coating, in particular with a reflection-minimizing treatment or coating on the outside. This can also contribute to increasing the perceptibility of the displayed visual content and the display quality perceived by passers-by. The anti-reflection coating is usually created using a coating with one or more layers (so-called anti-reflection coating).

It is understood that the features of the disclosure mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present disclosure.

• 1: eine perspektivische Heckansicht eines Fahrzeugs, in das ein System zur Bereitstellung von außerhalb oder innerhalb des Fahrzeugs wahrnehmbarem visuellen Inhalt integriert ist;
• 2: eine auf 1 beruhende Draufsicht auf das Fahrzeug zur Veranschaulichung eines Fahrzeugumfelds;
• 3: eine auf den 1 und 2 beruhende Seitenansicht des Fahrzeugs zur Veranschaulichung eines Fahrzeuginnenraums;
• 4: eine stark vereinfachte schematische Ansicht einer Ausführungsform eines offenbarungsgemäßen Systems;
• 5: eine vereinfachte schematische Frontalansicht einer Fahrzeugscheibe mit einem Emittersubstrat zur Anzeige visueller Inhalte;
• 6: eine schematische Schnittansicht durch eine Ausgestaltung einer Fahrzeugscheibe zur Veranschaulichung eines Schichtaufbaus;
• 7: eine schematische Schnittansicht durch eine weitere Ausgestaltung einer Fahrzeugscheibe zur Veranschaulichung eines Schichtaufbaus;
• 8: eine schematische perspektivische Schnittansicht einer Fahrzeugscheibe zur Veranschaulichung eines aktiven Betriebsmodus mit Darstellung von visuellem Inhalt auf der Scheibe;
• 9: eine weitere, auf 8 beruhende perspektivische Schnittansicht zur Veranschaulichung eines inaktiven Betriebsmodus mit erhöhter Transparenz der Scheibe;
• 10: eine weitere, auf 9 beruhende Schnittansicht mit geänderter Ansichtsorientierung zur weiteren Veranschaulichung des inaktiven Betriebsmodus; und
• 11: ein schematisches Blockdiagramm zur Veranschaulichung einer Ausführungsform eines Verfahrens zur Darstellung von visuellem Inhalt bei einem Fahrzeug.

Further features and advantages will become apparent from the following description of several preferred embodiments with reference to the drawings. They show:

• 1 : a rear perspective view of a vehicle incorporating a system for providing visual content perceivable outside or inside the vehicle;
• 2 : one on 1 based top view of the vehicle to illustrate a vehicle environment;
• 3 : one on the 1 and 2 based side view of the vehicle to illustrate a vehicle interior;
• 4 : a highly simplified schematic view of an embodiment of a system according to the disclosure;
• 5 : a simplified schematic front view of a vehicle window with an emitter substrate for displaying visual content;
• 6 : a schematic sectional view through an embodiment of a vehicle window to illustrate a layer structure;
• 7 : a schematic sectional view through a further embodiment of a vehicle window to illustrate a layer structure;
• 8th : a schematic perspective sectional view of a vehicle window to illustrate an active operating mode with display of visual content on the window;
• 9 : another, on 8th perspective sectional view illustrating an inactive operating mode with increased transparency of the pane;
• 10 : another, on 9 based sectional view with changed view orientation to further illustrate the inactive operating mode; and
• 11 : a schematic block diagram illustrating an embodiment of a method for displaying visual content in a vehicle.

1 shows, based on a perspective view, a system designated overall by 10 for displaying visual content in a vehicle 12. In particular, the system 10 is designed to display visual content (information, news, advertising and the like) on the vehicle 10 in such a way that the content is outside or within the vehicle 10 is noticeable.

The vehicle 12 has a body 14 with a plurality of vehicle windows 16. The vehicle windows 16 usually serve to perceive the surroundings of the vehicle 12 from within the vehicle 12. The system 10 uses at least one of the vehicle windows 16 to display visual content. The vehicle windows 16 include, for example, a windshield 18, front side windows 20, rear side windows 22, a rear window 24 and the like. In other vehicle categories, other types of vehicle windows 16 may be installed.

The system 10 enables the use of at least some of the vehicle windows 16 as an image surface 30 for displaying visual content 32 (shown here only symbolically). In the exemplary embodiment according to 1 For example, the front side window 20, the rear side windows 22 and the rear window 24 serve as an image area 30 for displaying visual content 32. The image area 30 can include the entire or almost the entire vehicle window 16. However, it is also conceivable to use a subset of the surface of the vehicle window 16 as the image surface 30. In the exemplary embodiment according to 1 For example, in the case of the rear window 24, the image area 30 there is designed such that the area of the rear window 24 is completely or almost completely filled. In a similar way, the surfaces of the further disks 18, 20 and 22 can also serve completely or almost completely as the image surface 30.

1 also shows a mobile device designated 40, which is designed as a smartphone, for example. The mobile device 40 has a camera 42 for capturing an environment of the mobile device 40. Furthermore, a screen 44 is provided for displaying information. In the embodiment according to 1 the mobile device 40 is aimed with its camera 42 at the rear side window 22 in order to reproduce the visual content 32 displayed there in the image area 30, compare an image section designated 46 with reproduced content. Furthermore, when using the mobile device 40, it is also conceivable to use its range of functions to provide interaction options and/or AR effects (augmented reality), compare the optical effect designated 48 on the screen 44 in 1 In this way, additional information 48 can be displayed using the mobile device 40 by interacting with the system 10, which may overlay the image (reproduced content 46). However, this is not to be understood as limiting.

2 illustrates a plan view of the vehicle 12 according to 1 . A schematic representation shows an image capture unit 50 which is arranged in particular in the interior of the vehicle (for example in the area of the roof liner). The image capture unit 50 comprises, for example, a camera housing 52 with at least one camera 54. If a plurality of the vehicle windows 18, 20, 22, 24 are to be used to provide the visual content, a plurality of such cameras 54 can be provided which are aligned accordingly.

The system 10 is designed to display the visual content 30 directly in the vehicle windows 18, 20, 22, 24. The visual content 30 can be made using a luminous emitter substrate (active emitter substrate) are generated directly in the respective vehicle window 18, 20, 22, 24. The image capture unit 50 is designed to observe the surroundings of the vehicle 12, for example through one of the vehicle windows 18, 20, 22, 24. In exemplary embodiments, the image capture unit 50 is also designed to monitor an interior of the vehicle 12.

In 2 58 also indicates an acceleration sensor, which is housed, for example, by the camera housing 52. The acceleration sensor 58 allows accelerations, movements, positions and/or orientations to be determined. In this way it can be detected whether the vehicle 12 is moving or not. In principle, the acceleration sensor 58 can also be used to detect manipulation attempts, theft attempts, vandalism and the like if corresponding signals suggest an impact on the camera housing 52 or other components of the system 10. In an exemplary embodiment, the acceleration sensor 58 is coupled to the image capture unit 50 in such a way that, in the event of an abnormal operating state, the surroundings of the vehicle 12 and/or the vehicle interior are monitored.

2 further illustrates various passers-by 60 who move in the vicinity of the vehicle 12. In principle, it is conceivable to use the image capture unit 50 to record the presence of passers-by 60. In principle, the system 10 can react to the presence of passers-by 60. In the event of the absence of passers-by 60, the system 10 can be put into an energy saving mode.

The vehicle 12 has a vehicle battery 66 which is in 2 is indicated schematically. The vehicle battery 66 is independent of the system 10, at least in exemplary embodiments. In the exemplary embodiment according to 2 the system 10 includes a control device 70, which is coupled, for example via a line designated 72, to the image surfaces 30 in the vehicle windows 18, 20, 22, 24 and (if present) to the at least one image capture unit 50 and/or the at least one acceleration sensor 58 . In the exemplary embodiment, the control device 70 is designed as a central control device. It goes without saying that the control device 70 can also be designed as a distributed control device. Communication within the system 10 can be wired or wireless.

The control device 70 is coupled to a power supply unit 74 via a power supply line 78. The power supply unit 74 comprises at least one battery 76. The battery 76 serves to supply power to the system 10. In the exemplary embodiment, the battery 76 is provided in addition to the vehicle battery 66. In this way, the functionality of the vehicle 12 is not impaired. The battery 76 is, for example, replaceable. It is also conceivable to charge the battery 76 via a system integrated into the vehicle 12. This can include a charging process using the vehicle battery 66 and/or an alternator integrated into the vehicle 12. However, it is also conceivable to implement a power supply in the vehicle 12 that operates independently of vehicle-side components. This can be, for example, photovoltaics or similar installed in addition to the vehicle's own electrical/electronic system with appropriate charging control for the battery 76.

3 is based on the representations 1 and 2 and illustrates a vehicle interior 80. The camera housing 52 with the at least one image capture unit 50 is arranged in the roof area 82 of the vehicle, but in the vehicle interior 80, in the exemplary embodiment. The system 10 is designed to be as inconspicuous as possible when viewed from outside or inside the vehicle 12, at least in an inactive mode when no visual content is displayed. If the image capture unit 50 is dispensed with, the system 10 can be integrated almost invisibly into the vehicle interior 80.

Vehicle occupants 84 sit in the vehicle interior 80. During normal operation of the vehicle 12 (active participation in road traffic), the system 10 is usually operated in such a way that a clear view through the vehicle windows 16 is possible. In other words, the vehicle windows 16 should be as transparent as possible from the perspective of the vehicle occupants 84 when looking outwards. This principle can be deviated from in special cases (warning of dangerous situations, traffic jams and the like).

The image capture unit 50 has at least one camera 54, which can also monitor the vehicle interior 80 if necessary. This can come into play, for example, if vehicle occupants 84 threaten or have caused damage, manipulation or theft of the camera housing 52 or other components of the system 10. For this purpose, data can also be used that is generated with the acceleration sensor 58 (see 2 ) be determined. The at least one camera 54 can also be used to monitor a vehicle's surroundings to passers-by 60 (see 2 ) capture.

In 3 are also indicated with 88 brightness sensors, which are integrated into the vehicle windows 16. At least one brightness sensor 88 is provided, which is at least adjacent to the image area 30 for the content to be displayed. The detection of a current brightness in the area of the vehicle windows 16 allows a targeted control of individual vehicle windows 16 or their image surface 30. In a particularly bright environment, the system 10 can, for example, be operated with a particularly high light intensity; in a dark environment it is the other way around.

4 illustrates, using a schematic block diagram, components and assemblies of an embodiment of the system 10, which is shown in the 1-3 is integrated into a vehicle 12.

The system 10 includes a control device 70 which is coupled to the at least one vehicle window 16 for control purposes. The vehicle window 16 includes an emitter substrate for displaying visual content as well as a contrast film and is controlled via the control device 70. In exemplary embodiments, at least one brightness sensor (compare the brightness sensor 88 in 3 ) integrated into the vehicle window 16. Here too, a functional coupling with the control device 70 can be provided. For these purposes, the control device 70 can be provided with a display image control 96. In the case of a switchable contrast film, a contrast film control 98 is also conceivable as part of the control device 70.

If an image capture unit 50 with at least one camera 54 (see 3 ) is provided on the system side, there is also a corresponding coupling with the control device 70. Furthermore, the control device 70 is coupled to the energy supply unit 74 with at least one battery 76. In the exemplary embodiment according to 4 In the control device 70, an (optional) condition monitoring 102 is also provided, which can be used, for example, to detect abnormal operating states (vandalism, theft, manipulation, accidents and the like). For this purpose, the condition monitoring 102 can be based on at least one acceleration sensor (compare the acceleration sensor 58 in 2 ) use provided data and control the image capture unit 50 in order to use the camera 54 to monitor an interior 80 and/or an environment of the vehicle 12.

It goes without saying that the control device 70 can have additional assemblies and functionalities. This concerns, for example, the implementation of a system for position detection (GPS, inertial navigation or similar), the coupling with vehicle-side systems, for example for charging the battery 76 of the energy supply unit 74, and the like.

In the exemplary embodiment, the control device 70 further has a communication unit 104, which is designed to provide communication with a server 106, for example in a cloud environment 108. The content to be displayed can be provided via the server 106, which is provided by the control device 70 in the Vehicle 10 is processed and displayed in the vehicle window 16. Further information and commands relating to the operation of the system 10 can also be exchanged with the server 106. This may also include billing data or payment data for content displayed (for advertising purposes).

The control device 70 can comprise further modules and further sensors, for example GPS sensors, sensors for detecting radio networks and the like.

5 illustrates an emitter substrate 92, which is provided in a vehicle window 16, using a schematic front view. In the exemplary embodiment, the emitter substrate 92 is part of an OLED film 90, in particular a transparent OLED film (also referred to as: TOLED film). The emitter substrate 92 or the OLED film 90 are adapted to the selected image area 30 in order to display visual content there by means of a pixel matrix 94. The pixel matrix 94 is controlled via the display image control 96. In this way, from the perspective of passers-by, visual content can be displayed in color on the image surface 30 directly on (or in) the vehicle window 16. In other words, the vehicle window 16 can be used to display visual information for passers-by 60 or other road users outside the vehicle 12, see here 2

6 illustrates, using a schematic sectional view, an embodiment of a vehicle window 16, which can be used to display visual content. 7 shows an alternative embodiment of a vehicle window 16. The vehicle window 16 is part of the system 10. Depending on the design, the vehicle window 16 can be designed as a windshield 18, front side window 20, rear side window 22 and / or rear window 24. Use as a front side window 20 or even as a windshield 18 is often dependent on regulatory requirements.

Vehicle window 16 includes an OLED film 90 with an emitter substrate, compare 5 . The OLED film 90 or its emitter substance council 92 has a front 110 and a back 112, compare 6 . The front 110 faces the surroundings of the vehicle 12. The back 112 faces the interior 80 of the vehicle 12. In the 6 and 7 A block arrow 114 illustrates a view of the window 16 from the inside (from the vehicle interior 80, cf 3 ). The opposite block arrow 116 illustrates a view of the window 16 from the outside, i.e. from the surroundings of the vehicle 12.

The vehicle window 16 according to 6 is designed as a single pane. There is - viewed from the outside - a pane 120, which is followed by an (optional) UV protective film 122, the OLED film 90 and a contrast film 126. At least the OLED film 90 is an essential part of a system 10 according to the disclosure for displaying visual content. The UV protective film 122 is used to reduce UV exposure in the vehicle interior. This function can also be partially performed by the OLED film 90 and possibly the contrast film 126. An essential purpose of a system 10 according to the disclosure is to provide visual content on the vehicle window 16 for observation from outside or inside the vehicle 12. Therefore, the structure of the vehicle window 16 provided with at least one OLED film 90 is adapted to observation from the outside (arrow 116) - or alternatively adapted to observation from within.

In the exemplary embodiment, the pane 120 is designed as a single pane, for example as single-pane safety glass. In principle, a structure of the pane 120 from several layers is also conceivable (laminated safety glass).

The OLED film 90 allows the creation and display of visual content 32 directly in the vehicle window 16. The OLED film 90 includes a luminous emitter substrate 92 in order to generate an externally perceptible image for passers-by or the like. The OLED film 90 can be controlled via a display image controller 96, which controls the emitter substrate 92 of the OLED film 90 to display images on the image surface 30 (see 5 ).

In exemplary embodiments, a contrast film 126 adjoins the OLED film 90 on the inside. The contrast film 126 is designed as a switchable film and can be controlled via a contrast film control 98. The contrast film 126 can be specifically darkened/tinted by applying a voltage through the contrast film control 98 in order to increase the contrast when observing the visual content displayed on the OLED film 90 from the outside. This comes into play, for example, when the surroundings of the vehicle 12 are very brightly lit (direct sunlight). In principle, an additional protective film can be attached to the inside of the vehicle window 16 (in 6 not shown separately). The display image control 96 and the contrast foil control 98 are part of the (superordinate) control device 70.

The structure based on the 7 illustrated vehicle window 16 is similar to that of 6 . However, the vehicle window 16 is designed as a multiple pane and is provided with an outer pane 120 and an inner pane 128, between which at least the OLED film 90 and, if necessary, the contrast film 126 and / or the UV protective film 122 are arranged. The design as a multiple pane increases the mechanical protection of the films used. In the design of the vehicle windows 16 according to 6 and 7 Brightness sensors and the like can also be integrated.

With reference to the 8-10 Various operating states of the system 10 or its components are illustrated. In the 8th and 9 a vehicle window 16 is shown schematically using a sectioned, perspective view, which also includes an outside of the vehicle window 16 (arrow 116, view from the outside). 10 shows the same condition as 9 , whereby due to the changed perspective in 10 An inside of the vehicle window 16 is also shown (arrow 114, view from the inside).

In 8th the system 10 is active and the display image controller 96 generates an image (visual content 32) on the OLED film 90 that is visible from the outside. For this purpose, the OLED film 90 is controlled via the display image control 96 in order to generate and display images in the emitter substrate 92 and thus directly in the vehicle window 16. In some cases, if available, the contrast film 126 can also be controlled; the contrast film control 98 is used for this purpose. The contrast film 126 can be tinted in this way by applying a voltage in order to increase the image quality, for example in bright environments.

The 9 and 10 illustrate a state in which the vehicle window 16 is no longer actively used to display visual content. The display image control 96 is inactive, there is no active illumination of the OLED film 90. At least in exemplary embodiments of the system 10, care is then taken to ensure that the OLED film 90 and, if present, the contrast film 126 are in a state that is as transparent as possible , if no visual content is displayed he follows. In other words, the vehicle window 16 is in the 9 and 10 The state shown is as transparent as possible under the circumstances; this can, for example, include a transmittance of at least 60% through the vehicle window 16. This transmittance is, for example, the total transmittance of the vehicle window 16 when viewed through the vehicle window 16, which may therefore be influenced not only by the OLED film 90, but also the contrast film 126 and any other optically effective films or coatings.

In this state, for example, a good view from the outside (arrow 116) to the inside is possible, compare 9 with an object 132 in the interior 80 of the vehicle 12 and its perception (reference number 134) from the outside (arrow 116). If necessary, this can also include a good view from the inside (arrow 114) to the outside, see here 10 with an object 138 outside the vehicle 12 and its perception (reference number 140) from the inside. It is understood that the representation in the 9 and 10 is primarily schematic in nature and serves illustrative purposes.

The 9 and 10 illustrate a condition that may be desired for regulatory reasons. The transparent state of the vehicle window 16 can be maintained according to this embodiment when the display image control 96 and the contrast film control 98 are inactive and thus no voltage is applied. By way of example, a so-called TOLED film, which is sufficiently transparent, can be used as the OLED film 90. With regard to the contrast film 126 (if used), it is conceivable to design and operate the contrast film control 98 in such a way that, even if the energy supply is interrupted, enough energy is buffered to control the contrast film 126 at least once in order to achieve a state that is as transparent as possible. This state can then be kept voltage-free.

This design makes the use of the system 10 also conceivable for vehicle windows 16 in the front area of the vehicle, compare the windshield 18 and the front side windows 20 in 2 . In the event of a failure of the system 10, maximum transparency is guaranteed so that traffic safety is ensured.

It is understood that those in the 9 and 10 Design shown with high transparency can be achieved in other embodiments even with active display image control 96 and active contrast film control 98. This can be suitable, for example, for rear vehicle windows 16, where there are lower requirements with regard to the degree of transparency when operating the vehicle 12.

Films 90 designed as OLED and in particular as TOLED can also be designed to be at least sufficiently transparent in active mode (visual content 32 for perception from outside or inside the vehicle is displayed in the vehicle windows 16) when viewed from the inside (arrow 114). In other words, a vehicle occupant can 80 (compare 3 ) even with an active system 10, the environment of the vehicle 12 can be perceived sufficiently well, at least in exemplary embodiments. This enables further applications for the system 10, possibly even an active mode while the vehicle 12 is driving.

With reference to 11 An exemplary embodiment of a method for providing visual content in a vehicle is illustrated using a schematic block diagram. In particular, the method relates to the provision of visual content that can be perceived from the outside (outside the vehicle) or inside (inside the vehicle) via the vehicle windows. In particular, the method relates to the provision of visual content for a stationary (parked) vehicle that is not directly involved in road traffic. However, this should not be understood as limiting.

The method includes a step S10, which relates to the provision of a vehicle window. The vehicle window comprises at least one actively luminous film with an emitter substrate and a switchable contrast film. The luminous film serves as an image surface for images generated in the emitter substrate. The contrast film is used to increase contrast when perceived from outside or inside the vehicle.

A further step S12 relates to the provision of a control device which includes a display image control and a contrast foil control. In exemplary embodiments, it is a central control device that includes the necessary control components for the desired display of the content.

The provision of visual content (step S14) requires an interaction of the units and elements provided in steps S10 and S12. The content is provided, for example, by a vehicle-side or external service or storage, compare step S16. The method is suitable for use in a client Server environment, with the vehicle-side control device representing the client. This is not to be understood as restrictive.

The representation of the visual content in step S18 includes control of the luminous emitter substrate (step S20) and control of the switchable contrast film (step S22). The use of an actively luminous film (OLED film or, if applicable, TOLED film) and a switchable contrast film has the advantage that the vehicle window can have a high level of transparency when not in use (with regard to the display of visual content). This is an advantage when the vehicle participates in road traffic.

If the vehicle window is used to display information, the luminous film can be controlled to provide a suitable surface for displaying the visual content. Furthermore, if present, the contrast film can be controlled to provide a suitable (tinted) background for the display that is perceptible from the outside. In this way, visual content that can be easily perceived from the outside can be provided via the vehicle window in a step S24.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 20212462 U1 [0003]
• FR 2824172 A1 [0003]
• US 20190098268 A1 [0004]

Claims (20)

System (10) for providing visual content (32) in a vehicle (12), in particular visual content (32) that can be perceived from outside or inside the vehicle (12) via its vehicle windows (16), the system (10) having the following : - at least one image surface (30), which is formed by an actively luminous emitter substrate (92) which is attached to or in a vehicle window (16), wherein the emitter substrate (92) has a front side (110), a back side (112) and a pixel matrix (94) for displaying pixel-based images, wherein the emitter substrate (92) is designed to display an image visible from outside or inside the vehicle (12) on the front (110) in an active mode, - a contrast film (126) designed as a switchable film, in particular on the back (112) of the emitter substrate (92), and - a control device (70) which comprises at least one display image control (96) and a contrast film control (98), wherein the display image controller (96) is designed to control the emitter substrate (92) to display visual content (32), and wherein the contrast film control (98) influences a degree of tint of the contrast film (126), in particular depending on a brightness parameter. System (10) after Claim 1 , wherein the luminous emitter substrate (92) is part of a TOLED film (90) or a TOLED glass. System (10) after Claim 2 , wherein the luminous emitter substrate (92) is part of a TOLED film (90), and wherein the TOLED film (90) is applied to a vehicle window (16) that is curved in several axes. System (10) according to one of the Claims 1 - 3 , wherein the emitter substrate (92) has a transmittance of at least 70% at least in an inactive mode. System (10) after Claim 4 , wherein the emitter substrate (92) has a transmittance of at least 70% even in active mode when looking at the back (112) from the vehicle (12). System (10) according to one of the Claims 1 - 5 , wherein at least one brightness sensor (88) is also provided, which is installed in particular close to the window or integrated into the vehicle window (16), and the control device (70) uses a signal provided by the brightness sensor (88) as a brightness parameter. System (10) according to one of the Claims 1 - 6 , wherein the contrast film (126) is designed as an electrochromic film. System (10) according to one of the Claims 1 - 7 , wherein the contrast film control (98) changes the tint level of the contrast film (126) when the emitter substrate (92) is in an inactive mode. System (10) according to one of the Claims 1 - 8th , wherein the contrast film (126) has maximum transparency in an inactive mode, and wherein the emitter substrate (92) has maximum transparency in inactive mode. System (10) after Claim 9 , wherein a voltage supply to the emitter substrate (92) is deactivated in the inactive mode, and preferably a voltage supply to the contrast film (126) is deactivated in the inactive state. System (10) according to one of the Claims 1 - 10 , wherein the vehicle window (16) is a front side window (20) or a windshield (18) of the vehicle (12). System (10) according to one of the Claims 1 - 11 , wherein a UV protective film (122) is also attached to the vehicle window (16), in particular on the front (110) of the emitter substrate (92). System (10) according to one of the Claims 1 - 12 , wherein the vehicle window (16) is designed as a single pane (120), and at least the emitter substrate (92), the contrast film (126) and in particular also the UV protective film (122) on an inside (114) on the single pane (120 ) are attached. System (10) according to one of the Claims 1 - 12 , wherein the vehicle window (16) is designed as a multiple pane (120, 128), and at least the emitter substrate (92), the contrast film (126) and in particular also the UV protective film (122) between an outer pane (120) and one inner disk (128) are arranged. System (10) according to one of the Claims 1 - 14 , further comprising at least one image capture unit (50) arranged in the vehicle interior with at least one camera (54), the camera (54) being directed at the emitter substrate (92) on the vehicle window (16). System (10) according to Claim 15 , wherein the control device (70) is designed to To detect the presence of passers-by through the vehicle window (16) and, on the basis of this detection, to control at least the display image control (96) for controlling the emitter substrate (92). System (10) after Claim 15 or 16 , wherein the control device (70) is designed to detect passers-by (60) and / or vehicle occupants (84) by means of the image capture unit (50) in the event of an abnormal operating state. System (10) according to one of the Claims 1 - 17 , further comprising a power supply unit (74) with a battery (76), which is provided in the vehicle (12) in addition to a vehicle battery (66). System (10) according to one of the Claims 1 - 18 , wherein the vehicle window (16) is provided with an anti-reflective coating, in particular with a reflection-minimizing treatment or coating on the outside (116). Method for providing visual content (32) in a vehicle (12), in particular visual content (32) that can be perceived from outside or inside the vehicle (12) via its vehicle windows (16), the method having the following steps: - Providing a vehicle window (16) with an image surface (30) mounted thereon or therein, which is formed by an actively luminous emitter substrate (92), the emitter substrate (92) having a front side (110), a back side (112) and a pixel matrix (94) for displaying pixel-based images and is designed to display an image visible from outside or inside the vehicle (12) in an active mode on the front (110), and with a contrast film (126) designed as a switchable film, in particular on the back (112) of the emitter substrate, - Providing a control device (70) which comprises at least one display image control (96) and a contrast foil control (98), - Applying a control voltage to the contrast film (126) through the contrast film control (98) in order to influence a degree of tint of the contrast film (126), in particular depending on a brightness parameter, and - Operating the emitter substrate (92) with the display image control (96) to display visual content (32) on the image surface (30) through the emitter substrate (92).

Images