The present invention relates to a head-up display in a motor vehicle.
Such head-up displays are used according to the prior art to project information which is of interest to the driver onto the windscreen of the motor vehicle. However, said displays have the disadvantage that the amount of information that can be displayed is limited.
It was therefore the object of the present invention to provide a head-up display which does not have the disadvantages of the prior art.
The object is achieved by a head-up display having at least two projection surfaces, which in each case have a different distance from the eye of the observer, for example the driver of the motor vehicle.
The present invention relates to a head-up display with which information can be displayed, for example for the driver of a vehicle, without the driver having to move his head and/or his eyes. Said information can be, for example, vehicle-relevant information, such as velocity, speed etc., or other information, such as for example infotainment information or directions from a navigation system.
According to the invention, information, for example for the driver of the motor vehicle, is then displayed on the projection surfaces. The projection surfaces are preferably arranged spatially one behind another. With particular preference, both projection surfaces are provided in the travel direction and one behind the other. One of said projection surfaces can be the windscreen of a motor vehicle. Preferably, however, at least one projection surface, with particular preference a plurality of projection surfaces, is/are a virtual projection surface in each case. The distance between a projection surface, in particular a virtual projection surface, and the eye of the observer is preferably 1.6-2.4, with particular preference 1.8-2.0 m. With particular preference information, such as the velocity of the vehicle, existing speed limits and/or information from a navigation system, is displayed on said first projection surface. With particular preference, the distance between a further, second projection surface and the eye of the observer is shorter than the distance between the first projection surface and the eye of the observer. Preferably safety relevant information, operational information of the vehicle and/or information of an infotainment system is displayed on said further, second projection surface. On both projection surfaces, numbers, letters and/or symbols can be displayed.
The items of information which are imaged on said respective projection surface can differ or be directly related to another. Preferably, the head-up display according to the invention can be used to generate 3D images.
Items of information can be displayed on the projection surfaces simultaneously and/or successively.
The projection surfaces are preferably arranged such that the observer can read information from them without moving his head. For example, a movement of the eye or of the eyes suffices to gather information from one or the other projection surface. Alternatively or additionally, information can be read from one or the other projection surface by differently focusing the eye/the eyes.
The head-up display according to the invention can have one or more imaging units. The number of the imaging units preferably equals the number of projection surfaces.
However, it is also possible to simultaneously or successively produce, using an imaging unit, a plurality of images, which are displayed simultaneously or successively in the respective projection surface. In the case of successive display, the frequency of the generated images is preferably so high that it is no longer resolvable for the human eye. Even if the images are displayed successively, the observer has the impression that they are present simultaneously.
The optical means preferably has a movable part with which the images are generated in the respective projection surface. Owing to the movement of the optical means, it is possible to switch between the projection surfaces.
The invention will be explained below with reference to the single
Number | Date | Country | Kind |
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10 2011 114 762.8 | Oct 2011 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2012/004055 | 9/27/2012 | WO | 00 | 3/31/2014 |