Head-up display for displaying virtual images

A head-up display, comprising:

• a first image source configured to provide a first image light;
• a first reflection device located beside the first image source;
• a second image source located on the first reflection device and configured to provide a second image light;
• a light combining device, wherein the second image source is located between the light combining device and the first reflection device, and the first image light is sequentially reflected by the first reflection device, passes through the second image source, and reflected by the light combining device to be transmitted to eyes of a user;
• and the second image light is reflected by the light combining device to be transmitted to the eyes of the user, and
• a plurality of second reflection devices respectively located on two opposite sides of the first image source, wherein the first image light is reflected to the first reflection device by the second reflection devices, the first reflection device and the light combining device are arranged in a first direction, and the plurality of second reflection devices are arranged in a second direction, and the first direction is perpendicular to the second direction.