LCD display unit for use in a reflection display system in a motor vehicle, and reflection display system
An LCD display unit for a reflection display system in a motor vehicle includes an LCD pixel matrix for selectively controlling picture elements for presenting a display image on a display area; a backlight arrangement, which is divided into selectively controllable dimming zones in order to illuminate regions containing multiple picture elements with background light; and a control unit, which is configured to control the LCD pixel matrix so that the display image is output, the display image being distorted using a warping function in order to compensate for a distortion of the display image as a result of reflection from a reflection region. The dimming zones have a shape and a size determined by the warping function.
1 . A liquid crystal display (LCD) display unit for a reflection display system in a motor vehicle, the LCD display unit comprising:
an LCD pixel matrix for selectively controlling image points for presenting a display image on a display surface;
a backlight arrangement, which is divided into selectively controllable dimming zones in order to light regions having a plurality of image points with backlight; and
a control unit, which is configured to control the LCD pixel matrix such that the display image that is output is distorted via a warping function in order to compensate for a distortion of the display image due to reflection at a reflection region,
wherein the dimming zones have a shape and a size that are determined by the warping function, and
wherein the dimming zones have different sizes that depend on respective frequencies of image points to be presented by the respective dimming zones.
2 . The LCD display unit according to claim 1 , wherein the dimming zones are formed such that the dimming zones adjoin one another, with a result that the display surface of the LCD pixel matrix on which the display image is to be presented is fully lightable.
3 . The LCD display unit according to claim 1 , wherein a shape of each of the dimming zones is distorted via the warping function proceeding from a rectangular shape of a display region that is to be backlit so as to be rectangular.
4 . The LCD display unit according to claim 1 , wherein a shape of each of the dimming zones is distorted via the warping function proceeding from rectangular shapes of display regions that are to be backlit so as to be rectangular of different sizes.
5 . The LCD display unit according to claim 1 , wherein each of the dimming zones of the backlight arrangement has an area and distribution that depend on display images to be displayed.
6 . The LCD display unit according to claim 5 , wherein the display images to be displayed are aligned with at least one of a horizontal or a vertical axis of the display surface.
7 . The LCD display unit according to claim 6 , wherein the display images to be displayed are formed as symbols or rectangular display fields which are selectively displayable.
8 . The LCD display unit according to claim 1 , wherein a collimation optical arrangement is configured to direct light from the backlight arrangement in a preferred direction.
9 . The LCD display unit according to claim 1 , wherein the dimming zones are configured in a shape of ring segments.
10 . A reflection display system for a motor vehicle, the reflection display system comprising:
the LCD display unit according to claim 8 , and
a windshield with a reflection region which is curved in a surface.