Display device, and method for controlling a display device

Abstract

The invention relates to a display device (100) comprising a first display element (110), which is designed to reproduce a first variable image content on an active display surface (111) pointing in an emission direction (E), wherein the active display surface (111) is at least partially surrounded by a passive display surface (112) pointing in the emission direction (E), and is not designed to reproduce a variable image content, and at least one cover element (104, 106), which is arranged in front of the first display element (110) in the emission direction (E) and completely covers the display surfaces (111, 112). A second display element (120) is arranged between the first display element (110) and the at least one further cover element (104, 106) and is designed to reproduce, substantially over its entire surface, a second variable image content which is independent of the reproduction of the first variable image content, said second display element substantially completely covering the passive display surface (112).

Description

[0001] Mercedes-Benz Group AG

[0002] Display device and method for controlling a display device

[0003] The invention relates to a display device according to the preamble of claim 1 and to a method for controlling such a display device.

[0004] Display devices or display elements are known from the prior art for reproducing variable image content provided via a video signal. Such displays typically have matrix-like pixels that can be controlled independently of one another. For displaying color images, each pixel can comprise several subpixels with specific spectral emission characteristics.

[0005] The large number of such pixels and, where applicable, subpixels necessitates a considerable amount of wiring for their connection, which reduces the area actually available for image reproduction. The active (image-ready) display area of ​​conventional displays is therefore surrounded by a border, also known as the passive display area or black print, which is visually perceived as distracting.

[0006] Document US 2014 / 0092341 A1 describes an electronic device with a display housed in a casing. The display comprises matrix-arranged pixels designed to emit light. These pixels are arranged in an active display structure with a rectangular outer contour surrounded by a passive border. A liquid crystal light distribution structure is used to direct light emitted from peripheral areas of the active display structure into an area of ​​the display that overlaps the passive border, thereby increasing the perceived display area. The light distribution structure includes a liquid crystal cell, a reflective polarizer, and a reflector.The reflector reflects light from the peripheral areas of the active display structure vertically upwards after the light has passed through the liquid crystal cell and been reflected by the reflective polarizer.

[0007] Document DE 603 ​​17 734 T2 describes an electronic hybrid display device comprising a combination of at least one light-emitting display element and at least one light-reflecting display element. The respective display element types are designed to show a viewer a representation of the same information and can be activated to compensate for variations in ambient lighting conditions.

[0008] According to a first aspect, the invention is based on the objective of providing an improved display device, in particular a display device with a display area that is largely unaffected and available for image display. This objective is achieved with a display device having the features of claim 1.

[0009] According to a second aspect, the invention is based on the objective of providing a method for controlling such a display device. This objective is achieved by a method with the features of claim 9.

[0010] Advantageous embodiments of the invention are the subject of the dependent claims.

[0011] According to the first aspect of the invention, a display device comprises a first display element and at least one cover element.

[0012] The first display element or display is configured to reproduce at least one variable image content, provided by a first video signal, on an active display surface facing in a direction of radiation. The active display surface is peripherally (at the edge) at least partially surrounded by a passive display surface facing in the direction of radiation, which is not configured to reproduce variable image content.

[0013] The at least one cover element is positioned in the direction of radiation in front of the first display element in such a way that the display surfaces are completely covered by it. A cover element can, for example, be designed as a cover glass (hereinafter also referred to as a cover plate) made of glass or plastic.

[0014] According to the invention, a second display element is arranged between the first display element and the cover element. The second display element is essentially designed to display a second variable image content independently of the display of the first variable image content and is arranged such that it essentially completely covers the passive display area.

[0015] The second display element causes the passive display area to be covered by the second variable image content. This creates the visual impression of a single variable image content that extends seamlessly across the entire surface of the display device facing the direction of emission.

[0016] Compared to known solutions, such as blacking out at least one cover element in the passive display area (a process known as blackprinting), this approach expands the design freedom for user interaction with such a display device. Furthermore, the second display element provides an information element and, optionally, a control element that is functionally integrated into the display device. This opens up additional possibilities for user interaction, such as displaying particularly important status information or a menu bar for frequently used user interactions on the second display element.

[0017] In one embodiment, the second display element is arranged between a front cover element (in the direction of radiation) and a rear cover element (in the direction of radiation), on the side of the front cover element facing away from the direction of radiation. Such a sandwich structure, similar to a laminated glass structure, improves the stability and robustness of the display device and protects the second display element from damage.

[0018] In one embodiment, the second display element is designed at least partially as an electrophoretic display and / or as an OLED (organic light-emitting diode) display and / or as an electroluminescent display. Such display technologies can be particularly easily integrated into thin plastic and glass structures. Furthermore, electrical lines for controlling such displays can be routed substantially or entirely on the reverse side facing away from the direction of emission and therefore do not impair the visibility of the displayed second image content.

[0019] In one embodiment, the second display element is designed as an electrophoretic display such that electrophoretic material is embedded in a cover element made of a plastic substrate and is controlled by electrodes arranged on both sides of the cover element, each electrically insulated from the plastic substrate by an insulating layer. Such an electrophoretic display has a particularly low energy consumption, making it especially suitable for display devices that are at least temporarily battery-powered and can even display static images without a power supply. This makes it very well suited for use in vehicles. Electrophoretic displays can also be manufactured to be particularly thin and are therefore suitable for integration with one or more thin cover elements. Furthermore, they offer a particularly wide reading angle and are robust.

[0020] In one embodiment, a touch-sensitive input element, for example a touch-sensitive film, is arranged essentially congruently with the area of ​​the second display element. This allows the second display element to be used for active input of user interactions. For example, frequently used user commands can be provided for direct access via the second display element, similar to buttons or a menu bar. This can improve ergonomics and user safety, particularly in operating situations with limited user attention, such as in a vehicle.

[0021] In one embodiment, the second display element has contact means for electrical supply and / or for supplying control signals, which are arranged on the side facing away from the direction of emission. This ensures that the visibility of the displayed second variable image content is not impaired, or only minimally so. In another embodiment, the display device is flexible, in particular rollable, foldable, or bendable. This expands the design possibilities, especially in confined spaces.

[0022] In one embodiment, the first display element has a rectangular outer contour and the second display element has an outer contour that is at least partially curved. This embodiment allows for particularly good integration of the display device into a space that is limited, for example, by design specifications.

[0023] According to a second aspect of the invention, in a method for controlling a display device according to the first aspect of the invention, the image content intended for display on the first display element is provided in a first video signal. The image content intended for display on the second display element is provided in a second video signal. Synchronous control signals for the first display element and for the second display element are generated from the first and the second video signals.

[0024] This method enables the display of image content that is aligned (for example, in color, brightness, and / or frequency) on the first and second display elements. This creates the impression of a homogeneous, seamless image reproduction that extends across the entire display device.

[0025] Further advantages of the method correspond to the advantages of the display device according to the first aspect of the invention.

[0026] In one embodiment of the method, the display device is arranged in a vehicle and the image content of the first video signal is aligned with the image content of the second video signal and / or with ambient lighting of the vehicle.

[0027] The second display element makes it possible to integrate the display device particularly seamlessly into the vehicle's ambient lighting, for example, by selecting the same or similar brightness and / or color as for other ambient lighting elements. In one embodiment of the method, the display device is arranged in a vehicle and equipped with a touch-sensitive input element whose surface is essentially congruent with the second display element. It is controlled in such a way that at least one frequently required user interaction is provided by displaying information on the second display element and detecting a touch via the input element.Alternatively or in addition to providing a particularly frequently needed user interaction, at least one user interaction can also be provided that is particularly plausible or likely in the context of the current first variable image content presented on the first display element. For example, when displaying infotainment content on the first display element, the second display element, in conjunction with the touch input element, can provide selection options for infotainment content (radio stations, saved music tracks, or lists of audio content). Conversely, when displaying navigation-related content on the first display element, selection options can be provided for, for example, preferred destinations or route options.

[0028] One advantage of this embodiment is that by at least partially shifting user interactions to the second display element, the first display element can be designed more simply (for example, in a non-touch-sensitive version) or utilized more effectively. Furthermore, the second display element and the touch input element can be designed for particularly robust and easy operation, for example, in poor lighting conditions or in a vehicle moving at a constant speed, while the first display element can be designed without regard to special requirements, and therefore more simply and cost-effectively.

[0029] Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

[0030] This shows:

[0031] Fig. 1 schematically shows an electronic display according to the state of the art,

[0032] Fig. 2 schematically shows a display with two cover elements and a second display element in a perspective exploded view; Fig. 3 schematically shows a display with a digital layer and integrated display board in a sectional view.

[0033] Fig. 4 schematically shows a sectional view of a display with a digital layer and a separate display board, as well as

[0034] Fig. 5 shows a schematic block diagram for a display device with a digital layer.

[0035] Corresponding parts are assigned the same reference symbols in all drawings.

[0036] Figure 1 schematically shows a top view of a first display element 110 or display 110 according to the prior art. Within a substantially rectangular active display area 111, pixels P are arranged in a matrix and can emit light in a direction E. A pixel P comprises a plurality of subpixels S, which are assigned different colors. For example, a pixel P can have at least one red-emitting subpixel S, at least one blue-emitting subpixel S, and at least one green-emitting subpixel S. The pixels P and their subpixels S can be controlled independently of one another via a display board 116, which is not shown in Figure 1 but will be explained in more detail below. In principle, this allows any color image to be displayed, with its spatial resolution corresponding to the number of pixels P and its color resolution corresponding to the number and characteristics of the subpixels S.

[0037] The display 110 has a passive display area 112 (edge ​​area 112) that surrounds the active display area 111 in a perimeter-like manner and on which no pixels P are arranged. Displays 110 manufactured using conventional methods require such an edge area 112 to accommodate the conductive traces necessary for contacting the pixels P and / or to mechanically embed and protect the active display area 111 with sufficient stability. Therefore, in conventional displays 110, an edge remains that cannot be used for image display. This impairs the visual appearance of the display and wastes installation space.

[0038] In the direction of emission E in front of the display 110, a cover element 104 is arranged, which mechanically protects the display 110. The cover 104 is opaque, usually printed in black, in an edge area congruent with the passive edge surface 112 (also referred to as blackprint). This conceals the conductive traces arranged on the edge surface 112 for contacting the pixels P.

[0039] Figure 2 schematically shows a display device 100 with a display 110 and a rear cover 104 arranged in front of it in the direction of emission E. The edge surface 112 of the display 110 is not particularly emphasized here for the sake of simplicity.

[0040] The display 110 can be implemented using any available display technology, for example, as a liquid crystal display (LCD), an OLED (organic light-emitting diode) display, a MicroLED (miniaturized light-emitting diode), or another electro-optical display technology. In an embodiment described in more detail below, the display 110 can be illuminated by LEDs (light-emitting diodes) arranged in the manner of a backlight.

[0041] The rear cover 104 is fully transparent and bonded to the display 110 with a transparent optical bonding 103, which prevents distracting reflections and improves the contrast and readability of the display 110. The optical bonding 103 can be in the form of a liquid bonding agent (liquid optical clear adhesive, LOCA or optical clear resin, OCR) or a film (optical clear adhesive, OCA).

[0042] In the direction of emission E, in front of the rear cover 104, a front cover 106 is arranged, which is also fully transparent. Between the rear cover 104 and the front cover 106, a second display element 120 is arranged as a digital layer 120, which is bonded to the rear and front covers 104 and 106, respectively, by means of an adhesive layer 105 that is optically essentially transparent at least in the visible wavelength range, in the manner of laminated safety glass.

[0043] Covers 104 and 106 can be made of materials such as aluminium silicate and / or soda lime glass.

[0044] The digital layer 120 is formed as an active display area 121 in a peripheral, circumferential, frame-like edge region 121. The edge region 121 is essentially congruent with the passive edge region 112 of the display 110, so that the conductor tracks applied to the edge region 112 (not shown in detail here) are covered by it.

[0045] The central window area 122, enclosed by the edge area 121, is transparent, allowing light emitted from the active display area 111 of the display 110 to pass through the covers 104, 106 and the digital layer 120 embedded therein in the direction of emission E. The central window area 122 can also be recessed, so that the digital layer 120 is reduced to the frame-like edge area 121.

[0046] The active display area 121 of the digital layer 120 can, for example, be implemented using electrophoretic technology. Electrophoretically active materials are known from the prior art, for example, as e-paper or e-ink. These typically consist of small microcapsules containing (for monochrome displays) black and white and / or (for color displays) colored pigment particles. These pigment particles are distributed within a microcapsule and produce an optical effect corresponding to their distribution. Under the influence of an electric field, which is applied by electrodes 123 arranged on both sides of a layer of electrophoretic material, the microcapsules change their original orientation. This alters the optical effect, such as the transparency or color, of the electrophoretic layer.Such electrodes 123 are not shown in detail in Figure 2, but will be explained in more detail below with reference to Figures 3 and 4. For example, electrodes 123 can be embedded in the adhesive layer 105 on both sides of the digital layer 120.

[0047] To generate raster-like images, the electrodes 123 arranged on both sides of the electrophoretic layer are also structured in a raster-like (matrix-like or grid-like) manner, so that each individual raster element can be individually changed in its representation.

[0048] For color rendering, colored pigment particles, in addition to black and white ones, are introduced into the electrophoretic layer. These pigment particles vary in size and move differently within a plastic substrate or liquid. By appropriate movement and / or positioning (under the influence of the electric field), mixed colors can also be created, derived from the primary colors of the individual pigment particles.

[0049] The electric field applied by the electrodes 123 is controlled by software by modulating the voltage across the electrodes over time. This modulation is dependent on changes in the desired image content. For example, if the color or gray value is to remain unchanged at a certain raster or pixel position of an electrophoretic layer, no voltage (no electric field) needs to be applied at that pixel position.

[0050] Alternatively or additionally (for example only in partial areas) the active display area 121 of the digital layer 120 can also be implemented in another light-emitting technology, for example in an OLED (organic light emitting diodes) technology or in an electroluminescence technology.

[0051] The digital layer 120 can be laminated onto one of the covers 104, 106, which is designed as a cover glass.

[0052] Alternatively, the digital Layer 120 can be laminated onto a plastic substrate or integrated between two plastic substrates. Lamination onto or integration between combinations of glass and plastic is also possible.

[0053] In an embodiment implemented using electrophoretic technology, the electrophoretic material can be injected directly into a plastic substrate and structured. In such an embodiment, an insulating layer is arranged on both sides of the plastic substrate, on which an electrode 123 (preferably with a grid or lattice pattern) is arranged.

[0054] In one embodiment, the digital layer 120 is configured as an interactive digital layer 120. For this purpose, a touch-sensitive film 107 can be arranged on, in front of, or behind the digital layer 120. The film is shaped to be congruent with the area of ​​the digital layer 120 and enables the digital layer 120 to be provided with touch functionality. By way of example, in Figure 2, the touch-sensitive film 107 is shown applied directly to the back of the digital layer 120.

[0055] Figure 3 shows a schematic cross-sectional view through a display device 100 with a display 110 and a digital layer 120 positioned in front of it in the direction of radiation E. The digital layer 120 is integrated between a front cover 106 and a rear cover 104 using electrophoretic technology. An electrode 123 is incorporated into each of the adhesive layers 105 that connect the digital layer 120 to the front and rear covers 106 and 104, respectively. The display of images in the active display area 121 of the digital layer 120 is controlled by the electrodes 123, which are located on both sides, as already described.

[0056] The image display on the display 110 is controlled by a display board 116, which is arranged behind the display 110 in the direction of radiation E and is designed, for example, as a printed circuit board. A display controller 140 is integrated into the display board 116, which (in a manner explained in more detail below) also controls the image display on the active display area 121 of the digital layer 120. For this purpose, the electrodes 123 arranged on both sides are connected to the display board 116 by a flexible connector 124, for example, in the form of a multi-core flexible cable, for electrical supply and / or for the transmission of control signals.

[0057] By arranging the display board 116 directly on the display 110, separate connections between the display board 116 and the display 110 are eliminated. This simplifies assembly. Furthermore, the connection can be made more robust and less prone to errors. The flexible connector 124 between the display board 116 and the digital layer 120 allows the digital layer 120 to be mounted independently of the display 110.

[0058] Figure 4 shows a purely schematic cross-sectional view of an embodiment in which, unlike in Figure 3, the electrodes 123 for controlling the electrophoretically formed digital layers 120 are not connected to the display board 116 located on the back of the display 110, but to a discrete display controller 140. The display controller 140 can also be designed as a printed circuit board, but is arranged independently of the display board 116 and separately from the display 110. The display controller 140 handles the overall control of the display 110 and the preceding digital layers 120. It is connected to both the electrodes 123 of the digital layers 120 and to the display board 116 via independent flexible connectors 124 for electrical supply and / or for the transmission of control signals.

[0059] An advantage of the embodiment shown in Figure 4 is that the display board 116 of a conventional display 110 does not need to be modified when the display 110 is provided with a digital layer 120 according to the invention.

[0060] In both the embodiment according to Figure 3 (where the control of the digital layer 120 is integrated into the display board 116) and in the embodiment according to Figure 4 (with separate display control 140), video signals 11, 12 are synchronized and controlled between the digital layer 120 and the display 110, as explained in more detail with reference to Figure 5.

[0061] A method for controlling the display device 100 according to the invention is explained in more detail below with reference to Figure 5. The display device 100 comprises a display 110 and a digital layer 120. The digital layer 120 is designed as a self-illuminating display. The display 110 can also be self-illuminating or, in an embodiment shown here, illuminated by LEDs (not shown) designed and arranged in the manner of a backlight, which are controlled by an LED driver circuit 150.

[0062] The display device 100 has a power supply 160 to supply the display 110, the LED driver circuit 150 and the digital layer 120, as well as a display control 140, which is also supplied by the power supply 160.

[0063] A first video signal 11 is provided by a video source 10, describing the sequence of images to be displayed on the display 110. A second video signal 12 is provided by a digital source 30, describing the visual effect to be displayed on the digital layer 120.

[0064] The video signals 11 and 12 are transmitted via a wired connection, for example, a flexible conductor, a flexible circuit board, or similar conductors, to a timing controller 130. The timing controller 130 synchronizes the video signals 11 and 12 and generates control signals for individual pixels P and, if applicable, their subpixels S of the display 110, as well as for writing to the digital layer 120 as a whole or to its areas, pixels P, and, if applicable, their subpixels S. For example, the timing controller 130 generates enable signals for the individual pixels P and synchronization signals.

[0065] The timing controller 130 and / or the associated display controller 140, which can be implemented, for example, as a microcontroller (microcontroller unit, MCU) 140 and provided on the display board 116, generate the control and data signals for controlling the rows and columns of the display 110. Using the display controller 140, for example, control signals for the digital layer 120 can be determined by evaluating the image sequence encoded by the first video signal 11, such that the display of the digital layer 120 is color-coded, in the

[0066] The intensity / brightness and / or rhythm are adjusted to match the sequence of images displayed on the 110 display. This results in a logical and visually coherent overall presentation. The viewer thus perceives the interplay between the 110 display and the 120 digital layer as a single, seamless display surface.

[0067] The illumination of a display 110 designed as an optically passive component can be achieved using LEDs, which are controlled by the display controller 140 via a driver circuit 150, for example, an LED driver circuit. The driver circuit 150 and / or the timing controller 130 can also be located on the

[0068] Display board 116 must be provided.

[0069] Furthermore, for example when such a display device 100 is used in a vehicle's infotainment unit, the appearance of the digital layer 120 can be varied depending on the displayed content and / or the currently selected operating mode. For example, warning messages can be highlighted by a signal-colored border, or different operating modes (navigation, telephone, radio, media playback, and similar modes) can be further emphasized by different colors or patterns on the digital layer 120.

[0070] Controlling ambient lighting 40 via the display controller 140 is also possible for use in a vehicle. In one embodiment, the display 110 is designed as a touch-sensitive display (touch display) and is connected to an external touch controller 20, which receives touch coordinates 21 from the display 110 and processes them into touch events 22, which are transmitted to the display controller 140. Depending on these touch events 22, the display controller 140 adjusts the display on the display 110 and / or the digital layer 120.

[0071] In addition to the display 110, the digital layer 120 can also be equipped with a transparent touch-sensitive film 107, so that touch functionality can also be extended to the edge area 121 of the digital layer 120, i.e., beyond the active display area 111 of the display 110. The touch controller 20 can also detect and process touch coordinates 21 and / or touch events 22 of the digital layer 120 and make them available to the display control 140.

[0072] A touch-sensitive film 107, positioned on, in front of, or behind the edge area 121, allows the user to directly control the lighting effects of the digital layers 120, for example, adjusting brightness and / or color. Control via gestures is also possible. Alternatively or additionally, control via voice input is possible.

[0073] Control signals generated by the display control 140 are processed by a signal / video processing unit 50 to control the video source 10, the digital source 30 and the ambient lighting 40.

[0074] Regardless of whether the display control 140 (as shown in Figure 3) is integrated into the display board 116 or (as shown in Figure 4) is provided as a separate component, the display control 140 analyzes the total image content to be displayed on the display device 100 and extracts from it the first video signal 11 and the second video signal 12, which is provided to the display 110 and the digital layer 12 respectively via the video source 10 and the digital source 30 respectively.

[0075] The timing controller 130 synchronizes the enable signals for individual pixels P to generate the necessary control and data signals. This allows the display of the digital layers 120 integrated into one or more covers 104 and 106 to be synchronized with and aligned to the display of the screen 110.

[0076] The pixel resolution of digital layer 120 is individually selectable. For example, digital layer 120 can be divided into individually addressable pixels, analogous to the pixels P of display 110. It is also possible to group several such pixels into blocks. Pixels within a block are then addressed identically (with the same color and / or brightness). Alternatively, instead of pixels, digital layer 120 can be divided into two-dimensional sectors, which can be individually addressed.

[0077] Pixels, blocks of pixels, or sectors can be controlled using a method called passive control, in which no additional electronic components are required on the digital layer 120 and each pixel, block, or sector is controlled via an individual conductor track. Such electrical conductor tracks can be created, for example, on the reverse side of the digital layer 120 facing away from the direction of emission E. This prevents the active display area 121 of the digital layer 120 from being obscured and improves the visual appearance.

[0078] The representation on the digital layer 120 can, for example, be adapted in color and / or brightness to the representation on the display 110. Areas (pixels, blocks of pixels, or sectors) of the digital layer 120 can be controlled in the same color and / or brightness as adjacent pixels P of the display 110. This creates the visual impression of a display device 100 that presents the entire image without distracting edges.

[0079] The display on the digital layer 120 can also be adapted depending on the operating or display mode of the display device 100. For example, in a display device 100 integrated into a vehicle, the digital layer 120 can be controlled in a warning color and / or flashing when the display 110 shows image content that requires special attention. Similarly, different colors or visual effects can be selected for the display on the digital layer 120 to show navigation content, entertainment content, vehicle status information, or similar content.

[0080] Furthermore, the digital layer 120, when used with a display device 100 installed in a vehicle, can be used for ambient lighting 40, either additionally or alternatively, in addition to being aligned with the display content of the display 110, and can be controlled via the vehicle's on-board computer. This enables a fluid lighting effect via individual light sources of the ambient lighting 40, which is complemented by different color gradients of the digital layer 120. For example, "welcome" scenarios, color feedback when setting vehicle parameters, and / or active driver assistance functions such as warning signals, brake signals, or lane keeping assist signals can be visualized in this way.

[0081] The digital layer 120 can, for example, alternatively display a specific color by default (e.g., black) and, if desired, be synchronized with the display content of the display 110. Dimming (luminance change) of the display 110 can also be transferred to the digital layer 120 and, optionally, to other elements of an ambient lighting system 40, depending on the displayed content and / or the ambient light conditions.

[0082] The digital layer 120 can be adapted to various shapes of a display device 100, for example, to display devices 100 with a curved display surface, foldable, rollable and / or flexible display devices 100. The outer geometry (contour) of the digital layer 120 and / or the display 110 can also be designed as desired and, in particular, does not have to be rectangular or in the form of a polygon.

Claims

Mercedes-Benz Group AG Patent claims 1. Display device (100) comprising a first display element (110) configured to display a first variable image content on an active display surface (111) pointing in a direction of emission (E), wherein the active display surface (111) is at least partially surrounded by a passive display surface (112) pointing in the direction of emission (E) which is not configured to display a variable image content, and at least one transparent cover element (104, 106) arranged in the direction of emission (E) in front of the first display element (110) and completely covering the display surfaces (111, 112), characterized in that a second display element (120) is arranged between the first display element (110) and the at least one further cover element (104, 106), which is substantially fully configured to display a second variable image content independently of the display of the first variable image content and which covers the passive The display area (112) of the first display element (110) is essentially completely covered.

2. Display device (100) according to claim 1, characterized in that the second display element (120) is located between a front cover element (106) in the direction of radiation (E) and a rear cover element (120) in the direction of radiation (E). The direction of radiation (E) is arranged on the side of the front cover element (106) facing away from the direction of radiation (E).

3. Display device (100) according to one of the preceding claims, characterized in that the second display element (120) is designed at least partially as an electrophoretic display and / or as an OLED (organic light emitting diodes) display and / or as an electroluminescence display.

4. Display device (100) according to one of the preceding claims, characterized in that the second display element (120) is designed as an electrophoretic display such that the electrophoretic material is introduced into a cover element (104, 106) made of a plastic substrate and is controlled via electrodes (123) arranged on both sides of the cover element (104, 106), each of which is electrically insulated from the plastic substrate by an insulating layer.

5. Display device (100) according to one of the preceding claims, characterized in that a touch-sensitive input element (107) is arranged substantially congruent with the area of ​​the second display element (120).

6. Display device (100) according to one of the preceding claims, characterized in that the second display element (120) has contact means for electrical supply and / or for supplying control signals, which are arranged on its side facing away from the direction of radiation (E).

7. Display device (100) according to one of the preceding claims, characterized in that the display device (100) is flexible, in particular rollable, foldable or bendable.

8. Display device (100) according to one of the preceding claims, characterized in that the first display element (110) has a rectangular outer contour and the second display element (120) has an outer contour that is curved at least in sections.

9. Method for controlling a display device (100) according to one of the preceding claims, characterized in that The first variable image content intended for display on the first display element (110) is provided in a first video signal (11), the second variable image content intended for display on the second display element (120) is provided in a second video signal (12), and synchronous control signals for the first display element (110) and for the second display element (120) are generated from the video signals (11, 12).

10. Method according to claim 9, characterized in that the image content of the second video signal (12) is matched to the image content of the first video signal (11) and / or to ambient lighting (40) of a vehicle.

Images