Backlight device for backlighting a display unit for a head-up display, head-up display and method for backlighting a display unit for a head-up display

摘要

The invention relates to a backlighting device (400) for backlighting a display unit (402) for a head-up display (100). The backlighting device (400) comprises at least one light source (404) for emitting a light beam (406) and at least one aperture (408) arranged between the light source (404) and the display unit (402) and having at least one aperture (410) for generating a beam cone (412) having a predetermined width using the light beam (406). Here, the diaphragm (408) and / or the diaphragm opening (410) is movable in at least one direction to change an angle of incidence of the beam cone (412) on the display unit (402).