Importance

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Abstract

The invention relates to a HUD system (100) with reduced reflection comprising an image display device (1) and a reflecting element (3) which are fixed and angled relative to each other, the image display device (1) being adapted to generate imaging light cones (11) radiating from points of an image generated thereby and reflected from the reflecting element (3), which imaging light cones (11) have their axes (T) pointing towards a designed detection point (23a) after reflection from the reflecting element (3), and wherein the imaging light cones (11) illuminate a designed detection area (23) in a plane passing through the detection point (23a), and wherein the HUD system (100) comprises a direction-selective light filter (20) arranged in the light path between the image display device (1) and the reflecting element (3), in which direction-selective light filter (20) a plurality of light guiding channels (22) passing through the direction-selective light filter (20) are arranged such that each of the channels (22) is configured in such a way as to be substantially transparent to imaging light cones (11) entering that channel (22), and to substantially block reflection light cones (12) reflected by the image display device (1) towards the reflecting element (3), which have axes (D) at different angles to the axes (T) of the imaging cones (11), wherein the image display device (1) is configured as a screen (2) closing an angle α with the reflecting element (3), and in that the light guiding channels (22) are arranged in the direction-selective light filter (20) in such a way that the period distance (p) defined by the width (h) and the wall thickness (w) of the light guiding channels (22) is at most one fifth or at least five times the pixel size of the screen (2).

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First Claim