CN114624919A

CN114624919A - Display device

Info

Publication number: CN114624919A
Application number: CN202111507825.9A
Authority: CN
Inventors: C·哈拉克; M·斯特雷科尔
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2020-12-11
Filing date: 2021-12-10
Publication date: 2022-06-14
Also published as: DE102020215733A1

Abstract

A display device (22) is proposed, comprising a liquid crystal panel (40), a backlighting unit (28) for backlighting the liquid crystal panel (40), and a cover element (42), wherein the backlighting unit (28) has a first sheet film (30) with a plurality of first sheets (32) arranged in parallel, wherein the first sheet film (30) is arranged such that a longitudinal direction of the first sheets (32) is at least approximately horizontally oriented. The display device (22) has a second sheet film (44) having a plurality of second sheets arranged in parallel, wherein the second sheet film (44) is arranged such that the longitudinal direction of the second sheets is oriented at an angle of 80 DEG to 100 DEG with respect to the longitudinal direction of the first sheets (32) of the first sheet film (30), and the second sheet film (44) is provided on a partial region of the liquid crystal panel (40).

Description

Display device

Technical Field

The present invention relates to a display device and a method of displaying an image representation using a display device.

Background

A multi-view display is known from WO2004036286a 1.

Disclosure of Invention

A display device is proposed, which comprises a liquid crystal panel, a background illumination unit for providing background illumination for the liquid crystal panel, and a cover element, wherein the background illumination unit has a first sheet film with a plurality of first sheets arranged in parallel, wherein the first sheet film is arranged such that a longitudinal direction of the first sheets is oriented at least approximately horizontally. The display device also has a second sheet film with a plurality of second sheets arranged in parallel, wherein the second sheet film is arranged such that a longitudinal direction of the second sheets is oriented at an angle of 80 ° to 100 ° with respect to a longitudinal direction of the first sheets of the first sheet film, and wherein the second sheet film is arranged on a partial region of the liquid crystal panel.

The display device may be arranged, for example, in a dashboard, an instrument panel, and/or in another location in the vehicle, for example at a pillar or a seat, for example on a seat back, or at a roof. By means of the display device, information or image representations can be displayed to the vehicle occupants, for example the driver and/or the passengers. The vehicle state or the vehicle mode may be displayed by a display device, for example. The output information can be, for example, information about the state of the vehicle, such as speed, rotational speed display, tank filling and/or information about vehicle navigation and/or information about entertainment systems.

The invention has the advantage that two different image representations can be displayed on different areas of the display device or the liquid crystal panel by means of the display device. In this way, for example, different graphical representations can be displayed for the driver and the passenger, so that the driver is not particularly distracted from the driver event. For example, information required for driving operation can be displayed to the driver and, in addition to this information, image representations of the entertainment system, for example, can be displayed to the passengers, wherein in particular the driver cannot see these image representations. This may, in particular, improve safety in road traffic. In particular, moving images or entertainment content that is not visible to the driver may be displayed to the passenger to meet legal and/or regulatory requirements. Furthermore, by using the sheet film in combination with other components, an optimized display can be achieved, whereby, in particular, the image representation can be reliably and/or confidently displayed. Furthermore, different viewers of the image representations may perceive them from different viewing angles. Advantageously, by means of the first sheet film, reflection of light on the windscreen can be reduced or prevented, and by means of the second sheet film, the image representation can only be displayed to the passenger. Furthermore, energy can be saved in particular, since the emitted light is transmitted to the observer particularly efficiently. Furthermore, the use of a sheet film can save construction space and/or effort, for example costs. For example, the use of several background illumination units and liquid crystal panels for displaying several image representations can be avoided, whereby in particular space, energy and/or effort, for example costs, can be saved.

In one exemplary design, the first sheet film may be designed to direct light in a horizontal direction and the second sheet film may be designed to direct light in a vertical direction. In this way, in particular by means of the first sheet film, light propagation in particular in the direction of the windshield can be avoided, whereby in particular reflections at the windshield can be reduced. The distraction of the driver can thereby be reduced, which improves safety in road traffic. Further, with the second sheet film, only the image illustration can be displayed to the passenger. Thus, the driver is not distracted by the second image representation, which may also improve safety in road traffic.

The second sheet film can advantageously be of rectangular design. In this way, in particular, the available installation space can be utilized optimally, as a result of which installation space can be saved. Furthermore, the image illustration may be reliably and/or confidently displayed to a viewer of the display device. In addition, moving images or entertainment content that is not visible to the driver may be displayed to the passenger to meet legal and/or regulatory requirements.

In a further development, the cover element can be arranged on the liquid crystal panel by means of an optical adhesive material. In an alternative embodiment, the cover element may be disposed on the partial area of the liquid crystal panel and the second sheet film by means of an optical adhesive material. As a result, the image representation can be displayed particularly reliably and/or confidently. Furthermore, the cover element can be arranged particularly reliably and/or securely on the liquid crystal panel. This can save construction space, for example.

In an exemplary design, an opaque print can be arranged at least partially on the cover element. In this way, the transition regions of the viewing area can be obscured, for example by imprinting. For example, one or more edges of the sheet film may be obscured or obscured so that the image representation may be optimized. In other words, visible edges may be obscured.

The cover element can advantageously be colored. For example, the masking element may have a transmittance of greater than about 70%. In an alternative embodiment, the adhesive material in which the cover element is arranged on the liquid crystal panel may be colored. By means of the coloring, in particular the black value (Schwarzwert) of the visible surface of the display device can be improved, whereby a uniform black surface can be produced for the viewer.

In an advantageous embodiment, the second sheet film can be arranged on the liquid crystal panel by means of an optically transparent adhesive. As a result, the image representation can be displayed particularly reliably and/or confidently. In particular, the function of the sheet film can be supported in particular in that the direction of the light is improved in particular. For example, optical reflection between the sheet film and the liquid crystal panel may be reduced or avoided. Furthermore, the sheet film can be reliably and/or surely arranged on the liquid crystal panel, in particular. For example, construction space can thereby be saved. Furthermore, energy can be preferably saved, and the remaining brightness can be minimized from the perspective of the driver viewing the corresponding area of the display.

Preferably, the liquid crystal panel may have a first surface and a second surface opposite to the first surface, wherein the first surface is arranged facing the background lighting unit and the second surface is arranged facing the cover element, and wherein the second sheet film is arranged on a partial area of the first surface or a partial area of the second surface. This makes it possible to optimally arrange the sheet film on the liquid crystal panel. As a result, the image representation and/or representations can be displayed to the observer particularly reliably and/or securely. For example, optical reflection between the sheet film and the liquid crystal panel can be reduced or avoided, in particular. In addition, a construction space can be saved in particular.

In a further refinement, the display device may have a third sheet film with a plurality of third sheets arranged in parallel, wherein the third sheet film is arranged such that a longitudinal direction of the third sheets is oriented at an angle of 80 ° to 100 ° with respect to a longitudinal direction of the first sheets of the first sheet film, the longitudinal direction of the third sheets is oriented parallel to a longitudinal direction of the second sheets of the second sheet film, and the third sheet film is arranged on a partial region of the liquid crystal panel. In an advantageous embodiment, the liquid crystal panel can have one or the first surface and one or the second surface opposite to the first surface, wherein the first surface is arranged facing the background lighting unit and the second surface is arranged facing the cover element, wherein the second sheet film is arranged on a second partial region of the second surface, and wherein the third sheet film is arranged on a first partial region of the first surface, and wherein the first partial region and the second partial region are arranged overlapping. By using the third sheet film, the function of the second sheet film can be supported, in particular. As a result, an image representation that is not visible in particular to the driver can be displayed to the passenger. In this way, safety in road traffic can be advantageously increased. Furthermore, the comfort of the passenger in the vehicle can be increased in particular, since the image representation of the entertainment system can be displayed to the passenger.

In an advantageous design, the background illumination unit can be designed to emit light rays with different brightness in one or more partial regions. In this way, in particular, the brightness in the different partial regions can be compensated or compensated for.

Furthermore, a method for displaying two image representations with a display device is proposed, comprising the steps of:

light is emitted in the direction of the liquid crystal panel by the background illumination unit,

light is directed in the horizontal direction through the first sheet film,

displaying a first image representation on a first partial area of the liquid crystal panel by means of the first portion of the directed light,

displaying a second image representation on a second partial area of the liquid crystal panel by means of the second part of the directed light,

a second portion of the light of the displayed image representation is directed in the vertical direction by means of the second sheet film.

A method for displaying two image representations with a display device according to any one of the preceding claims is also proposed, having the following steps:

light is directed in the horizontal direction through the first sheet film,

a second portion of the light is directed in a vertical direction by means of a second sheet film,

a second image representation is displayed on a second partial region of the liquid crystal panel by means of the second portion of the guided light rays.

The advantage of the proposed method is that different image representations can be displayed for different viewers. For example, only relevant information, for example about the state of the vehicle, can be displayed to the driver, while in addition to this information or illustrations of the entertainment system can be displayed to the passengers. This increases the safety in road traffic, since in particular the driver is not distracted, while at the same time the comfort of the passengers is increased in such a way that he can perceive an image representation of the entertainment system. Furthermore, the efficiency can be increased by the proposed method by guiding the light by means of the sheet film. This makes it possible in particular to save costs, for example costs and/or energy, and/or to save installation space.

In a further development, the method can also have the step of directing the second part of the light in the vertical direction by means of a third sheet film. By using the third sheet film, in particular, the function of the second sheet film can be supported and improved. As a result, the image representation can be displayed only for the passenger, so that the driver is not distracted by the image representation, for example of an entertainment system, displayed to the passenger. As a result, in particular, the construction space and/or expenditure, for example costs and/or energy, can be reduced.

Drawings

Embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description. For elements shown in different drawings and functioning similarly, the same reference numerals are used, wherein a repeated description of the elements is omitted. Wherein:

FIG. 1 shows a schematic top view of a vehicle according to an embodiment of the invention;

FIG. 2 shows a schematic view of a portion of a vehicle according to an embodiment of the invention;

FIG. 3 shows a schematic view of a background lighting unit according to an embodiment of the invention;

FIG. 4 shows a schematic diagram of a display device according to an embodiment of the invention;

FIG. 5 shows a schematic diagram of a display device according to an embodiment of the invention;

FIG. 6 shows a schematic diagram of a display device according to an embodiment of the invention;

FIG. 7 shows a schematic view of a portion of a display device according to an embodiment of the invention;

FIG. 8 shows a schematic view of a portion of a display device according to an embodiment of the invention;

FIG. 9 shows a schematic view of a portion of a display device according to an embodiment of the invention;

FIG. 10 shows a schematic view of a portion of a display device according to an embodiment of the invention;

FIG. 11 shows a schematic view of an instrument panel of a vehicle having a display device according to an embodiment of the present invention;

FIG. 12 shows a schematic diagram of a method for displaying two image representations according to an embodiment of the invention;

fig. 13 shows a schematic diagram of a method for displaying two image representations according to an embodiment of the invention.

Detailed Description

Fig. 1 shows a schematic top view of a vehicle 20, for example a motor vehicle, for example a car, with a display device 22. The display device 22 is designed to display at least one or more image representations for a first viewer 24 and/or a second viewer 26 of the display device 22. The display device 22 may be arranged, for example, in a dashboard or instrument panel of the vehicle 20 and/or at another location in the vehicle, for example at a pillar or a seat, for example on a seat back, or at a roof. Via the display device 22, information about the vehicle 20, for example vehicle state information or information about the vehicle mode, for example speed and/or rotational speed and/or temperature and/or tank filling and/or navigation prompts and/or information of a vehicle entertainment system and/or other information which can be used for the operation of the vehicle 20, can be displayed.

The arrangement of the display device 22 in the vehicle 20 allows the

observer

24, 26 to observe the information displayed by the display device 22. The

observers

24, 26 may be, inter alia, vehicle occupants, such as a driver and/or passengers of the vehicle 20. Preferably, the first observer 24 is a driver and the second observer 26 is a passenger. Alternatively or additionally, the display device 22 may be disposed at another location in the dashboard of the vehicle 20. The display device 22 may be disposed in a center console or dashboard, particularly in front of the passenger 26.

Fig. 2 shows a schematic illustration of a part of a vehicle 20 with a display device 22 from one side. The display device 22 according to fig. 2 can be designed in particular in accordance with the display device 22 according to fig. 1. Furthermore, the display device 22 according to fig. 2 can be arranged in the vehicle 20, in particular according to the display device 22 according to fig. 1.

Fig. 3 shows a schematic view of a background illumination unit 28 according to an embodiment of the invention. The background illumination unit 28 according to fig. 3 can be arranged in particular in the display device 22 according to fig. 1, 2 or according to fig. 4 to 11. The arrangement of the background lighting unit 28 relative to the windscreen 29 of the vehicle is also shown.

The background lighting unit 28 has a first sheet film 30 with a plurality of first sheets 32 arranged in parallel, wherein the first sheet film 30 is arranged such that the longitudinal direction of the first sheets 32 is at least approximately horizontally oriented. In this advantageous design, the longitudinal direction of the first sheet 32 is directed towards the drawing. The background illumination unit 28 also has a light source 34. The light source 34 is specifically designed to emit light rays 36, 38. Light rays 36, 38 of the light source 34 are specifically sent in the direction of the first sheet film 30. If the light rays 36, 38 strike the first sheet film 30, and thus the first sheet 32, only light rays 38 that extend at least nearly parallel or within a defined angular range relative to the first sheet 32 are allowed to pass. The light rays 38 that are allowed to pass through do not specifically strike or intersect the first page 32. Light rays 36 impinging on the first sheet 32 at angles greater than the defined range of angles are absorbed by the first sheet 32. In this way, the light rays 36, 38 emitted by the light source 34 can be guided by means of the first sheet film 30, in particular in the horizontal direction, in particular relative to the windshield 29. In this manner, light 38 may pass through the first sheet film 30, particularly in a horizontal band.

Fig. 4 shows a schematic diagram of a display device 22 according to an embodiment of the invention. The display device 22 according to fig. 4 can be arranged in particular in a vehicle according to the display device 22 according to fig. 1, 2 and/or 11. The display device 22 comprises a liquid crystal panel 40, a background illumination unit 28 for providing background illumination for the liquid crystal panel 40 and a cover element 42.

The background lighting unit 28 may be designed in particular as the background lighting unit 28 according to fig. 3 and thus have a first sheet film 30 with a plurality of first sheets arranged in parallel, wherein the first sheet film 30 is arranged such that the longitudinal direction of the first sheets is at least approximately horizontally oriented. In this advantageous embodiment, horizontal means, in particular, horizontal with respect to the viewing direction of the observer, in particular of the observer. Thus, those light rays that may be emitted in an upward or downward direction relative to the display device 22 with reference to the viewing direction of the viewer are filtered out by the first sheet film 30.

The display device 22 also has a second sheet film 44 with a plurality of second sheets arranged in parallel, wherein the second sheet film 44 is arranged such that the longitudinal direction of the second sheets is oriented at an angle of 80 ° to 100 ° with respect to the longitudinal direction of the first sheets of the first sheet film 30. The second sheet film 40 is disposed on a partial area of the liquid crystal panel 40. The second sheet film 44 is preferably of rectangular design. The first sheet film 30 is specifically designed for directing light in the horizontal direction, wherein the second sheet film 44 is designed for directing light in the vertical direction. The mode of operation of the second sheet film 44 corresponds to the mode of operation of the first sheet film 30, wherein the second sheet film 44 is arranged rotationally, in particular at right angles, with respect to the first sheet film 30, so that the sheets of the first sheet film 30 and the sheets of the second sheet film 44 are arranged crosswise. The light impinging on the second sheet film 44 is thus directed in particular in the vertical direction. Therefore, light rays that strike the second sheet film 44 in the vertical direction, particularly at an excessive angle, are filtered out by the second sheet film 44. In this way, the image representation can be guided, for example, such that it is visible only to the passenger and not to the driver of the vehicle.

In this advantageous embodiment, the cover element 42 is arranged in particular by means of an optical adhesive material 46 on a partial region of the liquid crystal panel 40 and on the second sheet film 44. The optical adhesive material 46 can also be designed as an optically transparent resin or OCR or as a liquid adhesive material for planarizing the resulting edge of the second sheet film on the liquid crystal panel, in particular in the image Step height (double Step height). In other words, the cover member 42 is adhered to a partial area of the liquid crystal panel 40 and the second sheet film 44. In an advantageous embodiment, an opaque print can be arranged at least partially on the cover element 42. In a refinement, the covering element 42 and/or the adhesive material 46 can be colored.

The second sheet film 44 is disposed on the liquid crystal panel 40, particularly, by means of an optically transparent adhesive 48. In other words, the second sheet film 44 is fixed or adhered or arranged at the liquid crystal panel 40, in particular on a partial region of the liquid crystal panel 40, by means of an adhesive and/or an adhesive film, in particular an optically transparent adhesive 48.

The liquid crystal panel 40 has a first surface 50 and a second surface 52 opposite to the first surface 50, wherein the first surface 50 is arranged facing the background lighting unit 28 and the second surface 52 is arranged facing the cover element 42. The second sheet film 44 may preferably be disposed on a partial area of the first surface 50 or a partial area of the second surface 52. In this advantageous embodiment, the second sheet film 44 is arranged on a partial region of the second surface 52.

The sheet film may also be referred to as LCF or light control film, for example. In other words, two

sheet films

30, 44 arranged crosswise are used. Privacy performance may thus preferably be optimized by using crossed

LCFs

30, 44. The sheet film 44 arranged crosswise with respect to the first sheet film 30 fills in particular only a partial area of the liquid crystal panel.

The liquid crystal panel 40 may be specifically designed or referred to as a display and/or an LCD or LCD display or LCD panel. In particular, at least two display regions are provided on the liquid crystal panel 40 that can be perceived from different viewing angles. The shape of the defined area can be chosen arbitrarily, for example rectangular, oval and/or circular. The separation of the regions can be provided, for example, by a black print in the cover element 42, which can be designed as a cover glass, in order to improve the transition region of the two regions or of the two display regions in terms of visual quality. This can cover visible edges. Alternatively, the edges or transition regions or edges of one or both of the

sheet films

30, 44 can be arranged, for example, by means of a light-impermeable adhesive film.

Alternatively or additionally, a preferably light-transmitting film may be arranged in or on the backlighting unit 28 and/or on the sheet film, which film is printed and/or coated at least partially in the region of the transition region between the two display regions by means of an opaque material. The printed film is preferably disposed on the top surface of the first sheet film 30.

The background lighting unit 28 may preferably be designed as a backlight unit, in particular as a light source, for example one or more LEDs, OLEDs and/or LED-strips, and may further have a housing, a reflector, a light guide, a diffuser, a BEF, a DBEF and a first sheet film 30 or LCF. The first sheet film 30 is specifically designed to avoid reflections on the windshield. The second sheet film 44 is arranged crosswise with respect to the first sheet film 30, and has a smaller area than the first sheet film 30. The smaller area of the second sheet film 44 particularly defines an area that is visible only to the occupant. The second sheet film 44 is arranged in a material-fit manner on the rear side on the liquid crystal panel 40, in particular on the rear polarizer of the liquid crystal panel 40, preferably by an optical bonding process, for example by lamination (Laminieren) by means of an optically transparent adhesive 48 or OCA, in particular in order to avoid optical reflections and to improve the light direction of the second sheet film 44.

In other words, the background illumination unit 28 may be designed especially as a backlight, for example a standard edge backlight or a matrix backlight. In a further development, the background illumination unit 28 can have a local dimming function, whereby the brightness differences in the viewing zones can be locally compensated for the individual viewing zones, in particular by adjusting the backlight, which can be designed in particular as a brightness adjustment. This enables in particular a uniform display quality, since the brightness differences in the viewing area can be compensated by light losses in the structure. Furthermore, color differences in different viewing areas can be compensated for, in particular, by suitable color mapping methods.

The cover element 42 can be designed, for example, as a cover glass 42 and, in particular, by means of a material-fit connection, by means of a suitable optical bonding method, for example, by means of wet or hybrid bonding, by means of an optically transparent resin 46 or OCR46, on a partial region of the liquid crystal panel 40 and, in an advantageous design, on the second sheet film 44. The cover element 42 can be formed in particular from mineral glass or plastic, for example polycarbonate. In a further refinement, the cover glass 42 may have a black print on the back.

In an advantageous design, the background illumination unit 34 can be designed to emit light of different brightness in one or more partial regions. In other words, the background illumination unit 34 may emit light rays having different brightness. In particular, the brightness may vary according to the partial region. In other words, each partial region can be background-illuminated with an adjusted individual brightness. The background lighting unit can be designed in particular as a locally dimmable backlight, in particular as a locally dimmed matrix backlight.

Fig. 5 shows a schematic diagram of a display device 22 according to an embodiment of the invention. The display device 22 according to fig. 5 can be designed in particular in accordance with the display device 22 according to fig. 4. Furthermore, the display device 22 according to fig. 5 can be arranged in a vehicle, in particular according to the display device 22 according to fig. 1, 2 and/or 11.

In contrast to the display device 22 according to fig. 4, in the advantageous design according to fig. 5 the second sheet film 44 is arranged on a partial region of the first surface 50. The second sheet film 44 is thus particularly arranged on the first surface 50 of the liquid crystal panel 40 facing the background lighting unit 28. Furthermore, in this advantageous embodiment, the cover element 42 is thus arranged on the liquid crystal panel 40, in particular by means of an optical adhesive material 46.

Fig. 6 shows a schematic diagram of a display device 22 according to an embodiment of the invention. The display device 22 according to fig. 6 can be designed in particular in accordance with the display device 22 according to fig. 4 and/or 5. Furthermore, the display device 22 according to fig. 6, in particular the display device 22 according to fig. 1, 2 and/or 11, can be arranged in a vehicle.

Unlike the display device 22 according to fig. 4 and/or 5, the display device 22 according to fig. 6 has a third sheet film 54 with a plurality of third sheets arranged in parallel, wherein the third sheet film 54 is arranged such that the longitudinal direction of the third sheets is oriented at an angle of 80 ° to 100 ° relative to the longitudinal direction of the first sheets of the first sheet film 30 and the longitudinal direction of the third sheets is oriented parallel to the longitudinal direction of the second sheets of the second sheet film 44. Further, the third sheet film 54 is disposed on a partial area of the liquid crystal panel 40. Furthermore, in this advantageous configuration, the second sheet film 44 is arranged on a second partial region of the second surface 52 and the third sheet film 54 is arranged on a first partial region of the first surface 50, wherein the first partial region and the second partial region are arranged overlapping.

In other words, the second sheet film 44 and the third sheet film 54 are disposed on two opposing partial areas of the liquid crystal panel 40, wherein the two sheet films 44, 54 completely overlap. In other words, the sheet films 44, 54 are disposed on both sides of the liquid crystal panel 40.

The third sheet film 54 is provided on the liquid crystal panel 40 via, in particular, a second optically transparent adhesive 56. In other words, the third sheet film 54 is fixed or adhered or arranged on a partial area of the liquid crystal panel 40, in particular the liquid crystal panel 40, by means of an adhesive and/or an adhesive film, in particular the second optically transparent adhesive 56.

In alternative embodiments, both of the sheet films 44, 54 may be disposed on one side of the liquid crystal panel 40, either on one side of the first surface 50 or on one side of the second surface 52.

Fig. 7 shows a schematic view of a part of a display device 22 according to an embodiment of the invention. The display device 22 according to fig. 7 can be designed in particular in accordance with the display device 22 according to fig. 4, 5 and/or 6. Furthermore, the display device 22 according to fig. 7, in particular the display device 22 according to fig. 1, 2 and/or 11, can be arranged in a vehicle.

Unlike the display device 22 according to fig. 4, 5 and/or 6, the display device 22 according to fig. 7 is shown from above and shows the first sheet film 30 and the second sheet film 44 with a plurality of second sheets 58 arranged in parallel. The second sheet film 44 and the first sheet film 30 are arranged relative to each other such that the longitudinal direction of the second sheet 58 is oriented at an angle of 80 ° to 100 ° relative to the longitudinal direction of the first sheet 32 of the first sheet film 30.

Fig. 8 shows a schematic view of a part of a display device 22 according to an embodiment of the invention. The display device 22 according to fig. 8 can be designed in particular in accordance with the display device 22 according to fig. 4, 5 and/or 6. Furthermore, the display device 22 according to fig. 8, in particular the display device 22 according to fig. 1, 2 and/or 11, can be arranged in a vehicle.

In contrast to the display device 22 according to fig. 4, 5 and/or 6, the display device 22 according to fig. 8 is shown from above and shows different display regions, in particular a first display region 60 and a second display region 62, for different viewers. In the first display area 60, a first image representation can be displayed, which can be seen by the driver and the passenger, in particular. The second display area 62 may display a second image representation that may be or is only visible to the occupant. In this advantageous design, the first display region 60 is designed in an L-shape and the second display region 62 is designed in a rectangular shape, wherein the second display region 62 is arranged in particular in the upper right corner and is larger than the first display region 60.

Fig. 9 shows a schematic view of a part of a display device 22 according to an embodiment of the invention. The display device 22 according to fig. 9 can be designed in particular in accordance with the display device 22 according to fig. 4, 5, 6 and/or 8. Furthermore, the display device 22 according to fig. 9, in particular the display device 22 according to fig. 1, 2 and/or 11, can be arranged in a vehicle.

In contrast to the display device 22 according to fig. 8, the first display region 60 according to fig. 9 is rectangular in design. The second display region 62 is also rectangular in design and is arranged above the first display region 60 in the viewing direction of the viewer. The second display area 62 is in particular larger than the first display area 60.

FIG. 10 shows a schematic diagram of a portion of a display device 22 according to an embodiment of the invention. The display device 22 according to fig. 10 can be designed in particular in accordance with the display device 22 according to fig. 4, 5, 6, 8 and/or 9. Furthermore, the display device 22 according to fig. 10, in particular the display device 22 according to fig. 1, 2 and/or 11, can be arranged in a vehicle.

In contrast to the display device 22 according to fig. 9, the second display region 62 according to fig. 9 is arranged to the left of the first display region 60 in the viewing direction of the viewer.

Fig. 11 shows a schematic view of an instrument panel of a vehicle 20 having a display device 22 according to an embodiment of the present invention. The display device 22 according to fig. 11 can be designed in particular in accordance with the display device 22 according to fig. 4 to 10. Furthermore, the display device 22 according to fig. 11, in particular the display device 22 according to fig. 1 and/or 2, can be arranged in the vehicle 20.

In this advantageous design, the display device 22 is arranged as a passenger display in front of the passenger 26. By means of the display device 22, a first region 64 for displaying a first image representation can be formed, which in particular displays the image representation of the first display region for both the driver 24 and the passenger 26. The first region 64 may be designed or referred to specifically as a common viewing region 64. In other words, the first graphical illustration displayed in the first region 64 is perceptible to both the driver 24 and the passenger 26. To display the first image representation in the first region 64, light passing only through the first sheet film is specifically employed.

By means of the display device 22, a second region 66 is also formed for displaying a second image representation, which in particular displays only the image representation of the second display region for the passenger 26. The second region 66 may be specifically designed or referred to as a passenger region 66. In other words, only passenger 26 may perceive the second image representation displayed in second region 66. The second image representation is displayed in a defined area of the liquid crystal display. In order to display the second image representation in the second region 66, light rays are used in particular which pass through the first and second sheet films and, in a further refinement, additionally through the third sheet film.

FIG. 12 shows a schematic diagram of a method 70 for displaying two image representations with a display device according to an embodiment of the invention. The display device can be designed in particular according to the display devices according to fig. 4 to 11. Furthermore, the display device can be arranged in particular in accordance with the display device according to fig. 1, 2 and/or 11 in a vehicle.

In a first step 72 of the method 70, light is emitted in the direction of the liquid crystal panel by means of a background illumination unit.

In a second step 74 of method 70, light is directed in a horizontal direction by the first sheet film.

In a third step 76 of method 70, a first image representation is displayed on a first partial region of the liquid crystal panel by means of the first portion of the guided light.

In a fourth step 78 of method 70, a second image representation is displayed on a second partial region of the liquid crystal panel by means of the second portion of the guided light.

In a fifth step 80 of the method 70, a second portion of the light of the displayed image representation is directed in a vertical direction by means of the second sheet film.

In a further refinement, the fourth step 78 and the fifth step 80 may be performed in another order, so first the fifth step 80 and then the fourth step 78. Thus, the light is first guided in a fifth step 80 by means of the second sheet film, and then the image representation is displayed on the second partial area of the liquid crystal panel in a fourth step 78.

FIG. 13 shows a schematic diagram of a method 70 for displaying two image representations with a display device according to an embodiment of the invention. The display device can be designed in particular according to the display devices according to fig. 4 to 11. Furthermore, the display device can be arranged in a vehicle, in particular according to the display device according to fig. 1, 2 and/or 11. The method 70 according to fig. 13 may have, in particular, the steps of the method 70 according to fig. 12.

In a fifth step 80 of method 70, which is carried out in this advantageous embodiment before fourth step 78, a second portion of the light is directed in the vertical direction by means of the second sheet film.

In a sixth step 82 of the method 70, a second portion of the light is directed in a vertical direction by a third sheet film.

Claims

1. A display device (22) comprising a liquid crystal panel (40), a backlighting unit (28) for backlighting the liquid crystal panel (40), and a cover element (42), characterized in that:

the background lighting unit (28) has a first sheet film (30) with a plurality of first sheets (32) arranged in parallel, wherein the first sheet film (30) is arranged such that the longitudinal direction of the first sheets (32) is at least approximately horizontally oriented,

the display device (22) has a second sheet film (44) having a plurality of second sheets (58) arranged in parallel, wherein the second sheet film (44) is arranged such that the longitudinal direction of the second sheets (58) is oriented at an angle of 80 DEG to 100 DEG with respect to the longitudinal direction of the first sheets (32) of the first sheet film (30), and the second sheet film (44) is provided on a partial region of the liquid crystal panel (40).

2. A display device (22) according to any of the preceding claims, wherein the first sheet film (30) is designed for guiding light in a horizontal direction and the second sheet film (44) is designed for guiding light in a vertical direction.

3. The display device (22) according to any one of the preceding claims, characterised in that the second sheet film (44) is designed rectangularly.

4. The display device (22) according to any of the preceding claims, wherein the cover element (42) is arranged on the liquid crystal panel (40) by means of an optical bonding material (46).

5. The display device (22) according to any of the preceding claims, wherein the cover element (42) is arranged on a partial area of the liquid crystal panel (40) and on the second sheet film (44) by means of an optical adhesive material (46).

6. Display device (22) according to one of the preceding claims, characterized in that an opaque imprint is arranged at least partially on the cover element (42).

7. The display device (22) according to one of the preceding claims, characterized in that the cover element (42) and/or one or the optical bonding material (46) is/are designed colored.

8. The display device (22) according to any of the preceding claims, wherein the second sheet film (44) is arranged on the liquid crystal panel (40) by means of an optically transparent adhesive (48).

9. The display device (22) according to any one of the preceding claims, wherein the liquid crystal panel (40) has a first surface (50) and a second surface (52) opposite to the first surface (50), wherein the first surface (50) is arranged facing the backlight unit (28) and the second surface (52) is arranged facing the cover element (42), and the second sheet film (44) is provided on a partial area of the first surface (50) or on a partial area of the second surface (52).

10. The display device (22) according to any one of the preceding claims, wherein the display device (22) has a third sheet film (58) with a plurality of third sheets arranged in parallel, wherein the third sheet film (58) is arranged such that the longitudinal direction of the third sheets is oriented at an angle of 80 ° to 100 ° with respect to the longitudinal direction of the first sheets of the first sheet film (30), such that the longitudinal direction of the third sheets is oriented parallel to the longitudinal direction of the second sheets of the second sheet film (44), and the third sheet film (58) is provided on a partial region of the liquid crystal panel (40).

11. The display device (22) according to claim 10, wherein the liquid crystal panel (40) has one or the first surface (50) and one or the second surface (52) opposite to the first surface (50), wherein the first surface (50) is arranged facing a backlight unit (28) and the second surface (52) is arranged facing the cover element (42) such that the second sheet film (44) is arranged on a second partial area of the second surface (52) and the third sheet film (58) is arranged on a first partial area of the first surface (50) and the first and second partial areas are arranged overlapping.

12. A display device (22) according to any one of the preceding claims, characterized in that the background illumination unit (28) is designed such that light rays with different brightness are emitted in one or more partial regions.

13. Method (70) for displaying two image representations with a display device (22) according to any of the preceding claims, having the steps of:

emitting light in the direction of the liquid crystal panel (40) by means of the background illumination unit (28),

the light is guided in the horizontal direction by means of the first sheet film (30),

displaying a first image representation on a first partial area of the liquid crystal panel (40) by means of a first portion of the guided light,

displaying a second image representation on a second partial area of the liquid crystal panel (40) by means of a second portion of the guided light,

a second portion of the light of the displayed image representation is directed in the vertical direction by means of a second sheet film (44).

14. Method (70) for displaying two image representations with a display device (22) according to any of the preceding claims, having the steps of:

guiding a second portion of the light in a vertical direction by means of the second sheet film (44),

displaying a second image representation on a second partial region of the liquid crystal panel (40) by means of the second portion of the guided light.

15. The method (70) of claim 13 having the step of directing the second portion of the light in a vertical direction with the third sheet film (58).