VEHICLE AND ROOF CONSTRUCTION INCLUDING A DISPLAY DEVICE FOR USE THEREIN

The invention relates to a vehicle having a roof construction according to the preamble of claim 1.Display devices in vehicles are known from the prior art for instance in which display devices are attached to the interior side of the roof of a vehicle and which displays can easily be pivoted from a storage position into an operational position in which the display screen is readable to the occupants of the vehicle.In case a vehicle is equipped with a roof construction having a fixed semi-transparent panel or a roof construction having a semi-transparent panel which is openable, the use of a display devices becomes more complicated, especially when the roof construction is equipped with more than one semi-transparent panel and thus occupies a large area of the vehicle roof.In such case the use of display devices attached to the roof is difficult because when the display devices are in the storage position they would obstruct the view through the semi-transparent panels and the amount of light that may reach the interior. Also such display devices in their storage positions would influence other functionalities of the roof construction, for instance interfere with or completely cover the semi-transparent panels from the interior side, or obstruct ventilation in case of an opened panel.From a customer point of view there is a tendency to enlarge the size of the display devices such that the occupants can view larger images. Such larger display devices are not suitable to be simply rotated downwards from a stored position into an operational position, because the rotating display device will move close towards or even may be within the facial region of the occupant. To avoid this, the display device may be moved from a stored position into an operational position in a different way. In that case, the display device is positioned overhead in a horizontal plane with the display screen facing downwards, the display device may be moved horizontally to the front and at the same time may be rotated downwards whereby the front part of the display device rotates downward first towardsthe operational position. In this way it is avoided that the display device protrudes into the facial region of the occupant. Nevertheless also with this improved movement of the display device still the display device interferes with the functions of the roof construction. Next to this, when the display screen is facing downwards when the display screen is in its stored position, there may be a risk of damaging the display screen for instance by objects being movedin the interior. And when the display device is visible in the interior of the vehicle in their stored position, there may be an incentive for theft of the display device.It is one of the objects of the present invention to provide for a vehicle having a roof construction to be used in combination with a display device which can be used independent from the functions of the roof construction and which protects the display device against damages and theft.The object is achieved in a roof construction and a vehicle having the features of the characterizing portion of claim 1.Due to the position of the display device above the headliner when in its storage position, it is protected against damage which may be caused by moving objects in the interior space. As the headliner also hides the display device from view, it does not interfere, for example in allowing light entering through the open or transparent panel when in its storage position. The flexibility of the screen allows for non-interfering movements of the display screen into and out of the operational position.In one embodiment, the flexible display screen is connected to at least a first and second support element, the first support element being movable along substantially horizontal guides to move the display screen out of and into the cavity, the second support element being also movable along said guides and being movable downwardly and upwardly to move the screen into and from its lower operational position, a winding roller being provided to allow the second support element to form the display screen by unwinding the display screen.Consequently, the display screen is not only moved out of the way into its storage position, but the size is also minimized by winding it onto a winding roller. Unwinding the display screen can be done in a way not disturbing the occupants.At least one of said first and second support elements could include the winding roller to unwind and wind said flexible display screen.Preferably, the display device could include a third supporting element also movable along the substantially horizontal guides, and a support beam carrying the second support element through a vertical moving mechanism, preferably a vertical linkage, forming at least a part of the drive system, wherein the display screen preferably extends both between the first and second support element and between the second and third support element to show images in two opposite directions.In one embodiment, the first to third support element and the support beam are movable along the substantially horizontal guides as a unit to move the display screen from and to the storage position within the cavity, while the first and third support element are connected to the vertical linkage through a horizontal linkage and are configured to move with respect to each other and with respect to the support beam to activate the horizontal linkage and thereby the vertical linkage to move the second support element down and up.The drive system may comprise at least one drive motor, capable of driving at least one pair of flexible drive cables extending along the guides, said drive cables being connected to at least one of the support elements.The at least one panel may be at least semi-transparent and can be covered from the interior side by a sunscreen to block light coming through the panel, the sunscreen preferably being in the form of a rollo screen which can be rolled-on or - off from a winding roller which is positioned in the cavity for the at least one display screen. The display screen is preferably provided below the sunscreen, so that the sunscreen may be closed whenthe display device is in its operational position and therefore direct sunlight cannot reach the display screen.In one embodiment, the drive cables are operatively connected to both the sunscreen and the display device, and wherein the drive system of the display screen is provided with coupling/uncoupling members to either couple to or uncouple from the drive cables or the guides.In one particular embodiment, the display screen is formed by the sunscreen which is in the form of a rollo screen. In this way the sunscreen and the display screen are integrated.The invention also includes a roof construction for use in the vehicle as described above.The invention will be further explained with reference to the drawings showing exemplary embodiments of the roof construction and vehicle according to the invention.Fig. 1is a very schematic longitudinal sectional view of a vehicle with a roof construction.Fig. 2A - 2Cshow a part of the interior of the vehicle ofFig. 1on a slightly larger scale and with the display device in three different positions.Figs. 3Ais a schematic perspective view of the roof construction with the display device in its operational positionFig. 3Bshows detail IIIB inFig. 3Aon a larger scale.Figs. 4A - 4Cshow schematic side views of the display device illustrating 3 different positions thereof.Figs. 5is a view corresponding to that ofFig. 4Cbut showing another embodiment of the display device.Fig. 6A - 6Dare views corresponding to that ofFigs. 4A - 4C, but showing a different embodiment and with one additional position of the display device.Fig. 7A - 7Dare views corresponding to that ofFig. 6A - 6Dbut showing still another embodiment.Fig. 1illustrates a vehicle, in this case an SUV type passenger car, having a fixed roof 1, comprising an opening 2 formed therein and a roof construction attached to it. The roof construction ofFig. 1includes a, preferably, at least semi-transparent panel 3.Fig. 1shows a roof construction equipped with either one or more movable panels 3 or with a combinationof a fixed panel 3' in the rear of the roof opening 2 and a movable panel 3 in the front thereof. The roof construction may however also comprise one (large) fixed panel.Further a display device 4 is illustrated which is shown in an operational position. The operational position of the display device 4 is the position in which the rear occupant(s) RO has the optimum line of view on a display screen 5 of the display device 4. InFig. 1not only a display screen 5 is shown for the rear occupant(s) RO, but also a display screen 6 for front occupant(s) FO if they are turned 180 degrees in order to look backwards. This is particularly useful in full selfdriving vehicles wherein there is no driver necessary for driving the car.The display screens 5, 6 can be a flexible OLED-type screen or other flexible screen that emits images itself, but it can also be a passive display screen onto which images can be projected by a separate projector. This projector or these projectors can be arranged in a stationaryor movable manner at a distance from the display screen 5, 6 when in its operational position.Fig. 2Ashows a view of the interior of the vehicle with a part of the roof construction in the form of a sunscreen 7, here a flexible sunscreen (rollo) which can be wound on and off a winding roller 8. This winding roller 8 is positioned within a cavity 9 above a headliner 10 of the vehicle, covering fixed roof 1 and a frame 11 (seeFig. 3A) of the roof construction from below and hiding it from view. It is further shown inFig. 2that the display device 4, at least (parts of) display screen 5, 6, is also positioned at least substantially within cavity 9 when in its storage position where it is also hidden from view. An opening 12 at the front of cavity 9 allows display device 4 and sunscreen 7 to enter and exit cavity 9. Two elongated guides 13 also extend through opening 12 between cavity 9 and in this case a position in front of roof opening 2. The guides 13 extend below the side edges of roof opening 2 and are not only used to guide substantially horizontal movements of parts of display device 4, but also for guiding parts of an operating mechanism (not shown) for movable panel 3 and forguiding sunscreen 7 and in particular an operating beam 14 thereof, attached to the free forward end of sunscreen 7. Normally, guides 13 will be covered from below by headliner 10.Fig. 2Bshows how display device 4 is moved from its storage position within cavity 9 in forward direction along guides 13 to a position just behind front seats 15 at a proper viewing distance of rear occupants RO. It is also illustrated that display device 4 is moved to this position simultaneously with operating beam 14 so that sunscreen 7 is unwound.InFigs. 2A - 2Cit can be seen that display device 4 includes a rear support element 16 carrying a rear winding roller 16', a second support element 17 in the form of a vertically movable central guide beam determining a lower edge of display screen 5, 6 and a third support element 18 including a front winding roller 18'. Between the positions ofFig. 2Aand2Bthese support elements 16 - 18 move as a unit. In the position ofFig. 2B, rear winding roller 16' is locked with respect to guides 13 and unlocked from front winding roller 18' and central guide beam 17. When operating beam 14 is moved further forwards it still takes along front winding roller 18', while rear winding roller 16' is stationary. This relative movement between support elements 16 and 18 is used to move central guide beam 17 downwardly thereby unwinding flexible display screens 5, 6 from winding rollers 16', 18' so as to be moved into their operational position.Fig. 2Cillustrates that when front winding roller 18' and central guide beam 17 have reached their end position, operating beam 14 can be disconnected from front winding roller 18' so as to be moved to the front side of opening 2 and thereby cover opening 2 completely to prevent sunlight to enter the interior of the vehicle through roof opening 2 and through panels 3, 3'.Fig. 3Aand3Bshow an example of a drive system to use the relative movement of support elements 16 and 18 to move guide beam 17. First there is a support beam 19 which is slidably guided with its ends in guides 13. Guide beam 17 is movably supported by support beam 19 through a vertical linkage 20 (only one of the linkages is shown inFig. 3B, the same, but in mirror image, is provided near the opposite end of support beam 19, seeFig. 3A). A horizontal linkage 21 (also present on the other side) is connected to the first and third support elements 17, 19 and to vertical linkage 21, such that when the legs of horizontal linkage 21 are moved from parallel to a triangular shape (with guide 13 as base), the parallel legs of vertical linkage 20 are also moved from a parallel (horizontal, transverse) position to a triangular shape (with support beam 19 as base), such that guide beam 17 is moved downwardly.As is shown inFig. 3Bthe legs of horizontal linkage 21 are pivotally connected to a slider 22 on support beam 19 and at the same time one of the legs of vertical linkage 20 is also pivotally connected to slider 22. As a result, the movement of horizontal linkage 21 is transmitted into a vertical movement of vertical linkage 20 and thereby in a vertical movement of guide beam 17 in order to deploy display screens 5, 6. A movement of display screens 5, 6 to the storage position again is done in reverse order.The support elements 16, 18 for winding rollers 16', 18' and support beam 19 will be provided with slide shoes at their ends engaging sliding grooves in guides 13 in order to enable sliding movements with respect to these guides 13, just like operating beam 14. When operating beam 14 is electrically operated there will be mounted an electric motor 23 on frame 11 and push-and-pull cables 24 connecting the electric motor 23 through guides 13 to the ends of operating beam 14. This type of drive system is well known in the art. Also mechanisms to couple and uncouple or lock and unlock parts to a drive cable or to a guide 13 are known as well. Parts 25 and 26 of such locking/unlocking system are shown inFig. 3B.Figs. 4A - 4Cagain show how display screens 5, 6 are unwound by first locking rear winding roller 16' (Fig. 4A) and then continuing the sliding movement of front winding roller 18' (Fig. 4B) and using this relative horizontal movement to convert it into a vertical movement of guide beam 17 until display screens 5, 6 are in their operational position (Fig. 4C).Fig. 5shows an embodiment in which there is only display screen 5 wound on rear winding roller 16'. Front windingroller 18' is only used to create the relative horizontal movement, but this can also be accomplished by support element 18 without winding roller. Display screen 5 is fixedly connected at its end remote from rear winding roller 16' to support beam 19. In another embodiment it would also be conceivable to fix display screen 5 to guide beam 17. In the embodiment according toFig. 5the vertical screen 6 could still be used to display images to front occupants FO. Front winding roller 18' and its support element 18 can be left out completely if a linkage between first support element 16 and support beam 19 is able to activate vertical linkage 20. Operating beam 14 will then be coupled to support beam 19.Fig. 6A - 6Dagain show how operating beam 14 of sunscreen 7 controls movements of display device 4, so that sunscreen 7 is always closed/unwound at least partly if the display screens 5, 6 are moved to their operational position. This is not illogical as display screens 5, 6 will show their images in best quality if direct sunlight is blocked by sunscreen 7. If one wishes to only close sunscreen 7 display device 4 will always be moved to its operational position unless operating beam 14 could be uncoupled from front winding roller 18' at the start ofits forward movement, such that display device 4 will remain stationary in its storage position within cavity 9.In the embodiment ofFigs. 7A - 7Ddisplay device 4 and sunscreen 7 have their own (hand or electric) drive, so that the movements of display device 4 and (operating beam 14 of) sunscreen 7 are totally independent of each other.It is clear from the foregoing description that the invention provides a vehicle with a display screen that can be integrated in the roof of the vehicle, has an advantageous deploying movement and is hidden from view when not in use.The invention is not limited to the embodiments shown in the drawings and described hereinbefore which can be varied in different manners within the scope of the appended claims. For example, it would be possible that the sunscreen and the display screen are integrated, such that a part of the sunscreen could be moved downwardly into the shape as shown in the drawings to form the display screen. For example, at the operationalposition of the display screen there could be arranged two parallel spaced support rollers which come to lie below the closed sunscreen, while a vertically movable guide beam is positioned between the support rollers albeit above the sunscreen, such that when it is moved down, it creates a downward V-shape in the sunscreen. Both legs of the V-shape could be used as display screens. Furthermore, it would be possible that not the first and/or third support elements include winding roller(s) but the second support element. The embodiments shown in the drawings show a display screen extending from one guide to the other thus being substantially as wide as the panel. In case there is a central longitudinal beam along the roof of the vehicle interior, this central beam could carry further guides, such that two separate displays screens could be formed, one on each side of the central beam. See more