Dia and automotive dia projection system

1. A dia for an automotive dia projection system, the dia comprising:

a transparent substrate with an opaque coating in portions thereof, thereby forming a binary pattern for projection,

wherein the pattern has a dither noise microstructure, such that an associated image is projectable giving the perception of a greyscale image to a human viewer, and

wherein the coating is a low-reflective coating.

2. The dia according to claim 1 , wherein the dither noise microstructure is based on halftone dithering or random dithering.

3. The dia according to claim 1 , wherein a minimal structure size within the dither noise microstructure measures at least 1 micrometre.

4. The dia according to claim 1 , wherein the substrate is provided from a silicate glass or an optical polymer.

5. An automotive dia projection system comprising:

a dia according to claim 1 ;

an illumination module for backlighting the dia; and

a projection optic for projection of an image of the dia.

6. The dia projection system according to claim 5 , wherein the projection optic includes an angular magnification of 1 to 500.

7. The dia projection system according to claim 6 , wherein the projection optic includes an angular magnification of 10 to 100.

8. The dia projection system according to claim 5 , wherein the illumination module comprises an LED-based illuminant and an associated condenser optic.

9. A motor vehicle comprising:

the dia projection system of claim 6 for the projection of images for signalling or entertainment purposes, wherein the dia projection system is integrated into an exterior mirror, a rocker panel, a front end, a back end or an interior of a motor vehicle.

10. The dia according to claim 1 , wherein the coating is a chromium-based coating.