Abstract: A projection display device includes a light source module, a switch unit, and micro-scanning mirrors. The light source module provides a light beam. The switch unit receives the light beam and switches a transmission direction of the light beam to the corresponding one of the micro-scanning mirrors during each of periods. The micro-scanning mirrors cause the light beam to scan over projection surfaces to form images. The projection display device can project the images on the projection surfaces without image brightness loss.

Abstract: An anti-glare head-up display system for vehicles includes a projection imaging unit and a curved mirror. The projection imaging unit is in an upper region of a cabin of the vehicle. The curved mirror is on a top surface of an instrument panel of the vehicle. The curved mirror includes a doped glass, a high-reflection coating and a dark coating. The doped glass and the dark coating absorb visible light. The high-reflection coating is on a surface of the doped glass facing the projection imaging unit and has a high-reflection effect at wavelengths corresponding to light sources used by the projection imaging unit. The dark coating is on another surface of the doped glass opposite with the projection imaging unit. Light rays emitted by the projection imaging unit are projected onto the curved mirror, and light rays reflected from the curved mirror are projected onto the windshield to form a virtual image in front of the windshield.