Mercedes-Benz is working on a windshield that can turn into a screen. It also wants the rest of the car’s glass to get in on the act. The carmaker showed off both ideas at a technology event in Stuttgart last week, but it hasn’t said which cars might get them or when.

According to Mercedes-Benz , the windshield version uses a projector hidden in the dashboard. The projector beams images onto a see-through film inside the glass, and the film is built to keep the picture visible in bright sunlight. It also limits the viewing angle.

The driver can’t see what the front passenger is watching, and the passenger can’t see the driver’s content. Mercedes says the display could handle navigation and driving information, plus video calls and movies. The image only appears when it’s needed, so the glass looks normal the rest of the time.

Windows That Can Warn the Cars Behind You

The second idea puts tiny LED lights inside the window glass itself, and they’re nearly invisible when switched off.…