Backlight assembly and head-up display system

A head-up display system, comprising:

• a backlight assembly comprising:
• a light source configured to emit light;
• a birefringent component located at a side of the light source, wherein the birefringent component is configured to divide the light incident on the birefringent component into a first polarized light and a second polarized light, a vibration direction of the first polarized light is different from a vibration direction of the second polarized light, the birefringent component comprises a first region and a second region, the first polarized light corresponds to the first region, the second polarized light corresponds to the second region, and the first region and the second region at least partially do not overlap in an emission direction of the light;
• and
• at least one first dimmer located at a side of the birefringent component away from the light source, wherein the first polarized light propagates along a first direction after being emitted from the at least one first dimmer, the second polarized light propagates along a second direction, and the first direction intersects with the second direction,
• wherein the backlight assembly is configured to emit a first backlight beam and a second backlight beam, and a polarization direction of a light in the first backlight beam and a polarization direction of a light in the second backlight beam are perpendicular to each other, one of the first backlight beam and the second backlight beam corresponds to the first polarized light, and the other one of the first backlight beam and the second backlight beam corresponds to the second polarized light;
• a first image source configured to receive the first backlight beam and emit a first display light;
• a second image source configured to receive the second backlight beam and emit a second display light;
• and
• an optical element configured to receive and reflect the first display light to form a first virtual image, and configured to receive and reflect the second display light to form a second virtual image.