Vehicular Head-Up Display Using Geometrical Optical Structure to Shield Ambient Light

A vehicular head-up display using a geometrical optical structure to shield ambient light, disposed in a vehicle, comprising:

• an image forming unit disposed on a roof of the vehicle;
• a reflection mirror disposed below a windshield in the front of the vehicle, the reflection mirror having a reflection surface facing backward and upward with respect to the vehicle;
• and
• a light shield plate disposed below the windshield, the reflection mirror located between the light shield plate and the windshield, the light shield plate having a light shield surface facing forward and upward with respect to the vehicle, the light shield plate shielding light rays which come from the ambient light and are introduced by the reflection surface of the reflection mirror to enter the vehicle to project onto a user's eyes;
• wherein light rays emitted by the image forming unit are projected onto the reflection surface of the reflection mirror;
• light rays reflected from the reflection surface of the reflection mirror are projected onto the windshield;
• and light rays reflected from the windshield are projected onto the user's eyes so that the user sees a virtual image formed in front of the windshield.