DE102020215733A1 - display device - Google Patents

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), the backlighting unit (28) having a first lamellar film (30) having a plurality of first slats (32) arranged in parallel, the first slat film (30) being arranged in such a way that a longitudinal direction of the first slats (32) is aligned at least approximately horizontally. The display device (22) has a second lamellar film (44) with a plurality of second lamellae arranged in parallel, the second lamellar film (44) being arranged such that a longitudinal direction of the second lamellae is at an angle of 80° to 100° to the longitudinal direction of the first louvers (32) of the first louver film (30) and that the second louver film (44) is arranged on a partial area of the liquid crystal panel (40).

Description

State of the art

From the WO2004036286A1 a multi-view display is known.

Disclosure of Invention

Proposed is a display device comprising a liquid crystal panel, a backlighting unit for backlighting the liquid crystal panel, and a cover element, the backlighting unit having a first lamellar film with a plurality of first lamellae arranged in parallel, the first lamellar film being arranged in such a way that a longitudinal direction of the first slats is aligned at least approximately horizontally. The display device further includes a second lamellar film having a plurality of second lamellae arranged in parallel, wherein the second lamellar film is arranged such that a longitudinal direction of the second lamellae is oriented at an angle of 80° to 100° to the longitudinal direction of the first lamellae of the first lamellar film and wherein the second louver film is disposed on a portion of the liquid crystal panel.

A display device can be arranged, for example, in a dashboard, in a dashboard, in particular of a vehicle, and/or at another location in a vehicle, for example on a pillar or a seat, for example on a back of a seat, or a vehicle roof. Information or image representations can be displayed to a vehicle occupant, for example a driver and/or a passenger, by means of a display device. For example, a vehicle status or a vehicle mode can be displayed by means of a display device. The information that is output can be, for example, information about the vehicle status, such as the speed, the rpm display, the level of fuel in the tank and/or information about a vehicle navigation system and/or information about an entertainment system.

The advantage of the present invention is that a display device can be used to display two different images on different areas of the display device or the liquid crystal panel. In this way, for example, different image representations can be displayed for a driver and a passenger, as a result of which the driver in particular is not distracted from what is happening on the driver. For example, information necessary for driving can be displayed to a driver and, in addition to this information, images of an entertainment system can also be displayed to a passenger, for example, with a driver not being able to see them. In this way, in particular, road safety can be increased. In particular, a passenger can be given the opportunity to display moving images or entertainment content that cannot be seen by the driver in order to meet legal and/or regulatory requirements. Furthermore, by using the lamellar films in combination with the other components, an optimized display can be made possible, as a result of which the image display can be displayed particularly safely and/or reliably. Furthermore, the different viewers of the image representations can perceive them from different perspectives. Advantageously, reflection of the light rays on the windshield can be reduced or prevented by means of the first lamellar film, and an image display can only be presented to the front passenger by means of the second lamellar film. Furthermore, in particular energy can be saved since the emitted light beams are forwarded to the viewer in a particularly efficient manner. Furthermore, installation space and/or effort, for example costs, can be saved by means of the lamellar films. For example, the use of multiple backlighting units and liquid crystal panels for displaying multiple image representations can be avoided, as a result of which installation space, energy and/or effort, for example costs, can be saved in particular.

In an exemplary embodiment, the first louver film may be configured to direct light rays in a horizontal direction and the second louver film may be configured to direct light rays in a vertical direction. In this way, in particular by means of the first lamellar film, a transmission of light beams in particular in the direction of the windshield can be avoided, as a result of which reflections on the windshield can be reduced in particular. As a result, driver distraction can be reduced, thereby increasing road safety. Furthermore, by means of the second lamellar film, it can be made possible for an image to be displayed only to the front passenger. As a result, a driver cannot be distracted by a second image display, which can also increase road safety.

Advantageously, the second lamellar film can be rectangular. In this way, in particular, optimal utilization of the available installation space can be made possible, as a result of which installation space can be saved. Furthermore, an image representation can be displayed securely and/or reliably to a viewer of the display device. Furthermore, a passenger can ability to display moving images or entertainment content that cannot be seen by the driver 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 bonding material. In an alternative embodiment, the cover element can be arranged on a partial area of the liquid crystal panel and on the second lamellar film by means of an optical bonding material. As a result, the image display can be displayed in particular securely and/or reliably. Furthermore, the cover element can be arranged in particular securely and/or reliably on the liquid crystal panel. For example, space can be saved in this way.

In an exemplary embodiment, an opaque imprint can be arranged at least partially on the cover element. In this way, for example, a transition area of the visible area can be concealed by the imprint. For example, one or more edges of the lamellar film can be covered or laminated so that the image display can be optimized. In other words, visible edges can be hidden.

Advantageously, the cover element can be tinted. For example, the cover element can have a transmission of more than approximately 70%. In an alternative embodiment, the bonding material in which the cover element is arranged on the liquid crystal panel can be tinted. In particular, a black value of the visible surface of the display device can be improved by means of the tinting, as a result of which a uniform black surface can be produced for a viewer.

In an advantageous embodiment, the second lamellar film can be arranged on the liquid crystal panel by means of an optically clear adhesive. As a result, the image display can be displayed in particular securely and/or reliably. In particular, the function of the lamellar film can be supported in particular in such a way that the direction of the light rays is improved in particular. For example, optical reflections between the lamellar film and the liquid crystal panel can be reduced or avoided. Furthermore, the lamellar film can be arranged particularly securely and/or reliably on the liquid crystal panel. For example, space can be saved in this way. Furthermore, preferably energy can be saved and residual brightness from the driver's angle on the corresponding area of the display can be minimized.

Preferably, the liquid crystal panel can have a first surface and a second surface opposite the first surface, the first surface being arranged to face the backlighting unit and the second surface being arranged to face the cover element, and the second lamella film on a partial area of the first surface or on a portion of the second surface is arranged. This enables an optimal arrangement of the lamellar film on the liquid crystal panel. As a result, one and/or a plurality of image representations can be displayed particularly securely and/or reliably for an observer. For example, in particular optical reflections between the lamellar film and the liquid crystal panel can be reduced or avoided. Furthermore, space can be saved in particular.

In a further development, the display device can have a third lamellar film with a plurality of third lamellae arranged in parallel, the third lamellar film being arranged such that a longitudinal direction of the third lamellae is at an angle of 80° to 100° to the longitudinal direction of the first lamellae of the first lamellar film is oriented such that a longitudinal direction of the third louvers is oriented parallel to the longitudinal direction of the second louvers of the second louver film, and the third louver film is disposed at a portion of the liquid crystal panel. In an advantageous embodiment, the liquid crystal panel can have a first surface and a second surface opposite the first surface, the first surface being arranged facing the backlighting unit and the second surface being arranged facing the cover element, the second The fin film is disposed on a second portion of the second surface and the third fin film is disposed on a first portion of the first surface and the first portion and the second portion are disposed in an overlapping manner. In particular, the function of the second lamellar film can be supported by using a third lamellar film. As a result, a passenger can be presented with an image that is not particularly visible to a driver. As a result, road safety can advantageously be increased. Furthermore, in particular the comfort in the vehicle can be increased for a passenger, since the passenger can be shown image representations of an entertainment system.

In an advantageous embodiment, the backlighting unit can be designed to emit light beams with different brightness in one or more partial areas. Through this In particular, the brightness in the various sub-areas can be compensated or adjusted.

Furthermore, a method is proposed for displaying two image representations with a display device with the following steps,
Emitting light beams by means of the backlight unit in the direction of the liquid crystal panel,
directing the light beams in a horizontal direction by means of the first louver film,
Displaying a first image representation on a first partial area of the liquid crystal panel using a first part of the directed light beams,
Displaying a second image representation on a second partial area of the liquid crystal panel by means of a second part of the directed light beams,
directing the second portion of the light rays of the displayed image representation in a vertical direction by means of the second louvre film.

Also proposed is a method for displaying two image representations with a display device according to one of the preceding claims with the following steps,
Emitting light beams by means of the backlight unit in the direction of the liquid crystal panel,
directing the light beams in a horizontal direction by means of the first louver film,
Displaying a first image representation on a first partial area of the liquid crystal panel using a first part of the directed light beams,
directing a second part of the light rays in a vertical direction by means of the second louver film,
Displaying a second image display on a second portion of the liquid crystal panel using the second portion of the directed light beams.

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 a vehicle condition, can be displayed to a driver, while information or a display of an entertainment system can also be displayed to a passenger in addition to this information. As a result, road safety can be increased since a driver is not distracted in particular, while comfort is increased for a passenger by being able to perceive image representations of an entertainment system. Furthermore, the efficiency can be increased by the proposed method, in that the light beams are directed by means of the lamellar film. In this way, in particular expenditure, such as costs and/or energy, and/or installation space can be saved.

In a further development, the method can further comprise a step of directing the second part of the light beams in a vertical direction by means of the third louver film. The use of a third lamellar film can in particular support and improve the function of the second lamellar film. As a result, an image display can only be displayed for a passenger, so that a driver is not distracted by the image displays, for example an entertainment system, displayed for a passenger. In this way, in particular, installation space and/or effort, for example costs and/or energy, can be reduced.

character list

• 1 eine schematische Darstellung einer Draufsicht eines Fahrzeugs gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 2 eine schematische Darstellung eines Ausschnitts eines Fahrzeugs gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 3 eine schematische Darstellung einer Hinterleuchtungseinheit gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 4 eine schematische Darstellung einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 5 eine schematische Darstellung einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 6 eine schematische Darstellung einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 7 eine schematische Darstellung eines Teils einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 8 eine schematische Darstellung eines Teils einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 9 eine schematische Darstellung eines Teils einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 10 eine schematische Darstellung eines Teils einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 11 eine schematische Darstellung eines Armaturenbretts eines Fahrzeugs mit einer Anzeigevorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 12 eine schematische Darstellung eines Verfahrens zum Darstellen von zwei Bilddarstellungen gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
• 13 eine schematische Darstellung eines Verfahrens zum Darstellen von zwei Bilddarstellungen gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.

Exemplary embodiments of the invention are illustrated in the drawings and explained in more detail in the following descriptions. The same reference symbols are used for the elements that are shown in the various figures and have a similar effect, with a repeated description of the elements being dispensed with. Show it:

• 1 a schematic representation of a plan view of a vehicle according to an embodiment of the present invention;
• 2 a schematic representation of a section of a vehicle according to an embodiment of the present invention;
• 3 a schematic representation of a backlighting unit according to an embodiment of the present invention;
• 4 a schematic representation of a display device according to an embodiment of the present invention;
• 5 a schematic representation of a display device according to an embodiment of the present invention;
• 6 a schematic representation of a display device according to an embodiment of the present invention;
• 7 a schematic representation of a part of a display device according to an embodiment of the present invention;
• 8th a schematic representation of a part of a display device according to an embodiment of the present invention;
• 9 a schematic representation of a part of a display device according to an embodiment of the present invention;
• 10 a schematic representation of a part of a display device according to an embodiment of the present invention;
• 11 a schematic representation of a dashboard of a vehicle with a display device according to an embodiment of the present invention;
• 12 a schematic representation of a method for displaying two image representations according to an embodiment of the present invention;
• 13 a schematic representation of a method for displaying two image representations according to an embodiment of the present invention.

Embodiments of the invention:

1 shows a schematic representation of a 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 image representation or more 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 an instrument panel of the vehicle 20 and/or at another location in a vehicle, for example on a pillar or a seat, for example on a back of a seat, or a vehicle roof . Display device 22 can be used to display information relating to vehicle 20, for example vehicle status information or information about a vehicle mode, such as speed and/or rpm and/or temperature and/or tank filling and/or navigation instructions and/or information from a vehicle entertainment system and/or other information that can be used to operate a vehicle 20 is displayed.

The display device 22 is arranged in the vehicle 20 in such a way that the viewers 24 , 26 can view the information displayed by means of the display device 22 . A viewer 24, 26 can in particular be a vehicle occupant, for example a driver and/or a passenger of the vehicle 20. Preferably, the first viewer 24 is a driver and the second viewer 26 is a passenger. Alternatively or additionally, the display device 22 can be arranged at a different location in the dashboard of the vehicle 20 . The display device 22 can be arranged in the center console or in the dashboard, in particular in front of the front passenger 26 .

2 shows a schematic representation of a section of a vehicle 20 from one side with a display device 22. The display device 22 according to FIG 2 can in particular according to the display device 22 according to 1 be trained. Furthermore, the display device 22 according to FIG 2 in particular according to the display device 22 according to FIG 1 be arranged in the vehicle 20 .

3 shows a schematic representation of a backlighting unit 28 according to an embodiment of the present invention. The backlighting unit 28 according to FIG 3 in particular according to in a display device 22 according to 1 , 2 or according to 4 until 11 be arranged. Furthermore, the arrangement of the backlighting unit 28 in relation to a windshield 29 of a vehicle is shown.

The backlighting unit 28 has a first slat film 30 with a plurality of first slats 32 arranged in parallel, the first slat film 30 being arranged such that a longitudinal direction of the first slats 32 is aligned at least approximately horizontally. In this advantageous embodiment, a longitudinal direction of the first slats 32 points into the image plane. Furthermore, the backlighting unit 28 has a light source 34 . The light source 34 is designed, in particular, to emit light rays 36, 38. The light rays 36, 38 of the light source 34 are sent in particular in the direction of the first lamellar film 30. If the light rays 36, 38 hit the first lamellar film 30 and thus the first lamellae 32, only the light rays 38 that run at least approximately parallel or in a defined angular range to the first lamellae 32 are let through. In particular, the light beams 38 that are let through do not hit or intersect the first slats 32 . Light beams 36 that impinge on the first lamellae 32 at a greater angle than the defined angular range are absorbed by the first lamellae 32 . In this way, the light beams 36 , 38 emitted by the light source 34 can be directed by means of the first lamellar film 30 , in particular in the horizontal direction, in particular in relation to the windshield 29 . As a result, light beams 38 can pass through the first lamellar film 30, in particular in a horizontal band.

4 shows a schematic representation of a display device 22 according to an embodiment of the present invention. The display device 22 according to FIG 4 can in particular according to the display device 22 according to 1 , 2 and or 11 be placed in a vehicle. The display device 22 includes a Liquid crystal panel 40, a backlight unit 28 for backlighting the liquid crystal panel 40 and a cover element 42.

The backlighting unit 28 can in particular according to the backlighting unit 28 according to FIG 3 be formed and thus have a first lamellar film 30 with a plurality of first lamellae arranged in parallel, the first lamellar film 30 being arranged in such a way that a longitudinal direction of the first lamellae is aligned at least approximately horizontally. In this advantageous embodiment, horizontal means in particular horizontal in relation to an observer, in particular to a viewing direction of an observer. Thus, the light rays are filtered out by the first louver film 30, which would radiate in an upward or downward direction with respect to the display device 22 with respect to the viewing direction of the viewer.

The display device 22 also has a second lamellar film 44 with a plurality of second lamellae arranged in parallel, the second lamellar film 44 being arranged such that a longitudinal direction of the second lamellae is at an angle of 80° to 100° to the longitudinal direction of the first lamellae of the first Lamella film 30 is aligned. The second louver film 40 is arranged on a portion of the liquid crystal panel 40 . Preferably, the second lamellar film 44 is rectangular. Specifically, the first louver film 30 is configured to direct light rays in a horizontal direction, while the second louver film 44 is configured to direct light rays in a vertical direction. The functioning of the second lamellar film 44 corresponds to the functioning of the first lamellar film 30, with the second lamellar film 44 being arranged rotated in particular at a right angle to the first lamellar film 30 such that the lamellae of the first lamellar film 30 and the lamellae of the second lamellar film 44 cross are arranged. The light beams which impinge on the second lamellar film 44 are therefore directed in particular in the vertical direction. Thus, by means of the second lamellar film 44, in particular those light rays are filtered out which impinge on the second lamellar film 44 at too great an angle in the vertical direction. In this way, for example, an image representation can be directed in such a way that it is only visible to a passenger and not to a driver of a vehicle.

In this advantageous embodiment, the cover element 42 is arranged on a partial area of the liquid crystal panel 40 and on the second lamella film 44 in particular by means of an optical bonding material 46 . The optical bonding material 46 can also be embodied as optically clear resin or OCR or as a liquid bonding material for planarizing the resulting edge, in particular in the step height image, of the second lamellar film on the liquid crystal panel. In other words, the cover member 42 is bonded on a portion of the liquid crystal panel 40 and on the second fin film 44 . In an advantageous embodiment, an opaque imprint can be arranged at least partially on the cover element 42 . In a further development, the cover element 42 and/or the bonding material 46 can be tinted.

The second lamellar film 44 is arranged on the liquid crystal panel 40 in particular by means of an optically clear adhesive 48 . In other words, the second lamella film 44 is attached or glued or arranged on the liquid crystal panel 40, in particular on a partial area of the liquid crystal panel 40, by means of an adhesive and/or an adhesive film, in particular an optical clear adhesive 48.

The liquid crystal panel 40 has a first surface 50 and a second surface 52 opposite the first surface 50 , the first surface 50 being arranged to face the backlighting unit 28 and the second surface 52 being arranged to face the cover element 42 . The second fin film 44 may preferably be disposed on a portion of the first surface 50 or on a portion of the second surface 52 . In this advantageous embodiment, the second lamellar film 44 is arranged on a partial area of the second surface 52 .

A lamellar film can, for example, also be referred to as an LCF or as a light control film. In other words, two crossed lamellar films 30, 44 are used. This preferably allows the privacy performance to be optimized by using crossed LCFs 30, 44. The lamellar films 44 arranged crosswise to the first lamellar film 30 fill in particular only a partial area of the liquid crystal panel.

The liquid crystal panel 40 can in particular be embodied or referred to as a display and/or as an LCD or as an LCD display or as an LCD panel. In particular, at least two display areas are created on the liquid crystal panel 40, which can be perceived from different viewing angles. The shape of the defined areas can be selected as desired, for example rectangular, oval and/or round. The separation of the areas can be defined, for example, by a black print in the cover element 42, which can be designed as a cover glass, around a transition area of the two zones or to improve the quality of the two display areas visually. This allows a visible edge to be covered. Alternatively, the edge or a transition area or an edge of one or both lamellar films 30, 44 can be arranged, for example, by means of a non-permeable adhesive film.

Alternatively or additionally, a preferably light-transparent film, which is at least partially printed and/or coated with an opaque material in the area of the transition area between the two display areas, can be arranged in or on the backlighting unit 28 and/or on the lamellar film. The printed film is preferably arranged on top of the first lamellar film 30 .

The backlighting unit 28 can preferably be designed as a backlight unit, and in particular a light source, for example one or more LEDs, OLEDs and/or an LED bar, furthermore a housing, a reflector, a light guide, a diffuser, a BEF, a DBEF and the first louver film 30 and the LCF, respectively. The first lamellar film 30 is designed in particular to avoid reflections on windshields. The second lamellar film 44 is in particular arranged crossed to the first lamellar film 30 and in particular has a smaller area in comparison to the first lamellar film 30 . In particular, the smaller area of the second louver film 44 defines the area that only the passenger can see. The second lamellar film 44 is preferably attached to the rear of the liquid crystal panel 40, in particular to the Rear polarizer of the liquid crystal panel 40 arranged cohesively.

In other words, the backlighting unit 28 can be embodied in particular as a backlight, for example as a standard edge backlight or a matrix backlight. In a further development, the backlighting unit 28 can have a local dimming function, whereby in particular brightness differences in the viewing areas can be compensated for locally by adjusting the backlight illumination for the individual viewing areas, which can in particular be designed as a brightness adjustment. In this way, in particular, a uniform display quality can be made possible, since differences in brightness in the viewing areas can be compensated for by the light losses in the structure. In addition, a suitable color mapping process can be used to compensate for color differences in the different visual areas.

The cover element 42 can be embodied, for example, as a cover glass 42 and in particular by means of a materially bonded connection using a suitable optical bonding method, for example wet or hybrid bonding using an optically clear resin 46 or an OCR 46 on a partial area of the liquid crystal panel 40 and be arranged on the second lamellar film 44 in an advantageous embodiment. The cover element 42 can in particular be made of mineral glass or plastic, for example polycarbonate. In a further development, the back of the cover glass 42 can have a black print.

In an advantageous embodiment, the backlighting unit 34 can be designed to emit light beams with different brightness in one or more partial areas. In other words, the backlight unit 34 can emit light beams with different brightnesses. In particular, the brightness can be varied depending on the sub-area. In other words, each sub-area can be backlit with an adjusted individual brightness. The backlighting unit can be designed in particular as a backlight capable of local dimming, in particular as a local dimming matrix backlight.

5 shows a schematic representation of a display device 22 according to an embodiment of the present invention. The display device 22 according to FIG 5 can in particular according to the display device 22 according to 4 be trained. Furthermore, the display device 22 according to FIG 5 in particular according to the display device 22 according to FIG 1 , 2 and or 11 be placed in a vehicle.

In contrast to the display device 22 according to FIG 4 is in accordance with this advantageous embodiment 5 the second fin film 44 is disposed on a portion of the first surface 50 . The second lamellar film 44 is thus arranged in particular on the first surface 50 of the liquid crystal panel 40 which faces the backlighting unit 28 . Furthermore, in this advantageous embodiment, the cover element 42 is arranged on the liquid crystal panel 40 in particular by means of an optical bonding material 46 .

6 shows a schematic representation of a display device 22 according to an embodiment of the present invention. The display device 22 according to FIG 6 can in particular according to the display device 22 according to 4 and or 5 be trained. Furthermore can the display device 22 according to FIG 6 in particular according to the display device 22 according to FIG 1 , 2 and or 11 be placed in a vehicle.

In contrast to the display device 22 according to FIG 4 and or 5 has the display device 22 according to 6 a third lamellar film 54 with a plurality of third lamellae arranged in parallel, the third lamellar film 54 being arranged in such a way that a longitudinal direction of the third lamellae is aligned at an angle of 80° to 100° to the longitudinal direction of the first lamellae of the first lamellar film 30 and that a longitudinal direction of the third fins is oriented parallel to the longitudinal direction of the second fins of the second fin film 44 . Furthermore, the third louver film 54 is arranged on a partial area of the liquid crystal panel 40 . Furthermore, in this advantageous embodiment, the second lamellar film 44 is arranged on a second partial area of the second surface 52 and the third lamellar film 54 is arranged on a first partial area of the first surface 50, the first partial area and the second partial area being arranged in an overlapping manner.

In other words, the second lamellar film 44 and the third lamellar film 54 are arranged on two opposite partial areas of the liquid crystal panel 40, with the two lamellar films 44, 54 completely overlapping. In other words, 40 lamella films 44, 54 are arranged on both sides of the liquid crystal panel.

The third lamellar film 54 is arranged on the liquid crystal panel 40 in particular by means of a second optically clear adhesive 56 . In other words, the third lamella film 54 is attached or glued or arranged on the liquid crystal panel 40, in particular on a partial area of the liquid crystal panel 40, by means of an adhesive and/or an adhesive film, in particular a second optical clear adhesive 56.

In an alternative embodiment, both louver films 44, 54 may be placed on one side of the liquid crystal panel 40, either on the first surface 50 side or the second surface 52 side.

7 FIG. 12 shows a schematic representation of part of a display device 22 according to an exemplary embodiment of the present invention. The display device 22 according to FIG 7 can in particular according to the display device 22 according to 4 , 5 and or 6 be trained. Furthermore, the display device 22 according to FIG 7 in particular according to the display device 22 according to FIG 1 , 2 and or 11 be placed 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 7 from above and shows the first lamellar film 30 and the second lamellar film 44 with a plurality of second lamellae 58 arranged in parallel. The second lamellar film 44 and the first lamellar film 30 are arranged relative to one another in such a way that a longitudinal direction of the second lamellae 58 is at an angle of 80° to 100° to the longitudinal direction of the first louvers 32 of the first louver film 30 .

8th FIG. 12 shows a schematic representation of part of a display device 22 according to an exemplary embodiment of the present invention. The display device 22 according to FIG 8th can in particular according to the display device 22 according to 4 , 5 and or 6 be trained. Furthermore, the display device 22 according to FIG 8th in particular according to the display device 22 according to FIG 1 , 2 and or 11 be placed 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 8th shown from above and shows the different display areas, in particular a first display area 60 and a second display area 62, for different viewers. A first image display can be displayed in the first display area 60 and can be visible in particular to a driver and a passenger. A second image display can be displayed in the second display area 62, which can only be or is visible to a passenger. In this advantageous embodiment, the first display area 60 is L-shaped and the second display area 62 is rectangular, with the second display area 62 being arranged in particular in an upper right-hand corner and being larger than the first display area 60.

9 FIG. 12 shows a schematic representation of part of a display device 22 according to an exemplary embodiment of the present invention. The display device 22 according to FIG 9 can in particular according to the display device 22 according to 4 , 5 6 , and or 8th be trained. Furthermore, the display device 22 according to FIG 9 in particular according to the display device 22 according to FIG 1 , 2 and or 11 be placed in a vehicle.

In contrast to the display device 22 according to FIG 8th is the first display area 60 according to FIG 9 formed rectangular. The second display area 62 is also rectangular and is arranged above the first display area 60 in the viewing direction of an observer. The second display area 62 is, in particular, larger than the first display area 60.

10 FIG. 12 shows a schematic representation of part of a display device 22 according to an exemplary embodiment of the present invention. The display device 22 according to FIG 10 can in particular according to the display device 22 according to 4 , 5 6 , 8th and or 9 be trained. Furthermore, the display device 22 according to FIG 10 in particular according to the display device 22 according to FIG 1 , 2 and or 11 be placed in a vehicle.

In contrast to the display device 22 according to FIG 9 is the second display area 62 according to FIG 9 arranged to the left of the first display area 60 in the viewing direction of an observer.

11 shows a schematic representation of a dashboard of a vehicle 20 with a display device 22 according to an embodiment of the present invention. The display device 22 according to FIG 11 can in particular according to the display device 22 according to 4 until 10 be trained. Furthermore, the display device 22 according to FIG 11 in particular according to the display device 22 according to FIG 1 and or 2 be arranged in the vehicle 20 .

In this advantageous embodiment, the display device 22 is arranged as a passenger display in front of the passenger 26 . A first area 64 for displaying a first image representation can be spanned by means of the display device 22 , which in particular displays the image representation of the first display area both for the driver 24 and for the passenger 26 . The first area 64 can in particular be embodied or referred to as a common view area 64 . In other words, both the driver 24 and the passenger 26 can perceive the first image representation, which is represented in the first area 64 . For the representation of the first image representation in the first region 64, in particular the light beams that only pass through the first lamellar film are used.

A second area 66 for displaying a second image display is also opened up by means of the display device 22 , which in particular shows an image display of the second display area only for the front passenger 26 . The second area 66 can in particular be embodied or referred to as a passenger area 66 . In other words, only the passenger 26 can perceive the second image display, which is displayed in the second area 66 . The second image is displayed in a defined area of the liquid crystal display. For the display of the second image display in the second area 66, the light rays that pass through the first lamellar film and the second lamellar film and, in a further development, also the third lamellar film are used in particular.

12 shows a schematic representation of a method 70 for displaying two image representations with a display device according to an embodiment of the present invention. The display device can in particular according to the display device according to 4 until 11 be trained. Furthermore, the display device can, in particular, according to the display device according to FIG 1 , 2 and or 11 be placed in a vehicle.

In a first step 72 of the method 70, light beams are emitted by the backlighting unit in the direction of the liquid crystal panel.

In a second step 74 of the method 70, the light rays are directed in a horizontal direction by means of the first louvered film.

In a third step 76 of the method 70, a first image representation is displayed on a first partial area of the liquid crystal panel by means of a first part of the directed light beams.

In a fourth step 78 of the method 70, a second image representation is displayed on a second partial area of the liquid crystal panel by means of a second part of the directed light beams.

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

In a further development, the fourth step 78 and the fifth step 80 can be carried out in a different order and thus first the fifth step 80 and then the fourth step 78. Thus, the light rays are first directed by means of the second lamellar film in the fifth step 80 and then the image display is displayed on the second partial area of the liquid crystal panel in fourth step 78 .

13 shows a schematic representation of a method 70 for displaying two image representations with a display device according to an embodiment of the present invention. The display device can in particular according to the display device according to 4 until 11 be trained. Furthermore, the display can gevorrichtung in particular according to the display device according to 1 , 2 and or 11 be placed in a vehicle. The method 70 according to 13 In particular, the steps of the method 70 according to 12 exhibit.

In a first step 72 of the method 70, light beams are emitted by the backlighting unit in the direction of the liquid crystal panel.

In a second step 74 of the method 70, the light rays are directed in a horizontal direction by means of the first louvered film.

In a third step 76 of the method 70, a first image representation is displayed on a first partial area of the liquid crystal panel by means of a first part of the directed light beams.

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

In a fourth step 78 of the method 70, a second image representation is displayed on a second partial area of the liquid crystal panel by means of a second part of the directed light beams.

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

QUOTES INCLUDED IN DESCRIPTION

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Patent Literature Cited

• WO 2004036286 A1 [0001]

Claims (15)

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 backlighting unit (28) has a first lamellar film (30). has a plurality of first lamellae (32) arranged in parallel, the first lamellar film (30) being arranged in such a way that a longitudinal direction of the first lamellae (32) is aligned at least approximately horizontally, that the display device (22) has a second lamellar film (44) with has a plurality of second lamellae (58) arranged in parallel, the second lamellar film (44) being arranged in such a way that a longitudinal direction of the second lamellae (58) is at an angle of 80° to 100° to the longitudinal direction of the first lamellae (32) of the first louver film (30) and that the second louver film (44) is arranged on a partial area of the liquid crystal panel (40). A display device (22) according to any one of the preceding claims, characterized in that the first louver film (30) is adapted to direct light rays in a horizontal direction and the second louver film (44) is adapted to direct light rays in a vertical direction. Display device (22) according to one of the preceding claims, characterized in that the second lamellar film (44) is rectangular in shape. Display device (22) according to one of the preceding claims, characterized in that the cover element (42) is arranged on the liquid crystal panel (40) by means of an optical bonding material (46). Display device (22) according to one of the preceding claims, characterized in that the cover element (42) is arranged by means of an optical bonding material (46) on a partial area of the liquid crystal panel (40) and on the second lamellar film (44). 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). Display device (22) according to one of the preceding claims, characterized in that the cover element (42) and/or a or the optical bonding material (46) is tinted. Display device (22) according to one of the preceding claims, characterized in that the second lamellar film (44) is arranged on the liquid crystal panel (40) by means of an optically clear adhesive (48). Display device (22) according to one of the preceding claims, characterized in that the liquid crystal panel (40) has a first surface (50) and a second surface (52) opposite the first surface (50), the first surface (50) is arranged facing the backlighting unit (28) and the second surface (52) is arranged facing the cover element (42) and that the second lamella film (44) on a partial area of the first surface (50) or on a partial area of the second surface (52) is arranged. Display device (22) according to one of the preceding claims, characterized in that the display device (22) has a third lamellar film (58) with a plurality of third lamellae arranged in parallel, the third lamellar film (58) being arranged in such a way that a longitudinal direction of the third slats are aligned at an angle of 80° to 100° to the longitudinal direction of the first slats of the first slat film (30), that a longitudinal direction of the third slats is oriented parallel to the longitudinal direction of the second slats of the second slat film (44), and that the third Lamella film (58) is arranged on a portion of the liquid crystal panel (40). Display device (22) after claim 10 , characterized in that the liquid crystal panel (40) has a or the first surface (50) and a or the first surface (50) opposite the second surface (52), wherein the first surface (50) of the backlighting unit ( 28) is arranged facing and the second surface (52) is arranged facing the cover element (42), that the second lamellar film (44) is arranged on a second partial area of the second surface (52) and that the third lamellar film (58) on a first portion of the first surface (50) is arranged and that the first portion and the second portion are arranged overlapping. Display device (22) according to one of the preceding claims, characterized in that the backlighting unit (28) is designed in such a way that light beams with different brightness are emitted in one or more partial areas. Method (70) for displaying two image representations with a display device (22) according to one of the preceding claims with the following steps, emitting light beams by means of the backlighting unit (28) in the direction of the liquid crystal panel (40), directing the light beams in a horizontal direction direction by means of the first lamellar film (30), displaying a first image representation on a first portion of the liquid crystal panel (40) by means of a first part of the directed light beams, displaying a second image representation on a second portion of the liquid crystal panel (40) by means of a second part of the directed light rays, directing the second part of the light rays of the displayed image representation in a vertical direction by means of the second louver film (44). Method (70) for displaying two image representations with a display device (22) according to one of the preceding claims with the following steps, Emission of light beams by means of the backlighting unit (28) in the direction of the liquid crystal panel (40), directing the light beams in a horizontal direction by means of the first louver film (30), Displaying a first image representation on a first partial area of the liquid crystal panel (40) by means of a first part of the directed light beams, directing a second portion of the light rays in a vertical direction by means of the second louver film (44), Displaying a second image display on a second portion of the liquid crystal panel (40) using the second portion of the directed light beams. Method (70) according to Claim 13 , comprising a step of directing the second part of the light beams in a vertical direction by means of the third louver film (58).

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