Display device, head-up display system and vehicle

The utility model discloses a display device, a head-up display system and a vehicle, and relates to the technical field of head-up display, the display device comprises a backlight source and a display panel, a display area of the display panel is divided into a plurality of pixel units capable of respectively controlling light transmission, the backlight source comprises a plurality of light source units corresponding to the pixel units, each light source unit comprises a red light source, a green light source and a blue light source which are controlled to emit light, and the light source units emit color-mixed light beams through the corresponding pixel units so as to achieve color pictures of the display device. According to the display device, a color filter layer in an existing color display device is omitted, for each pixel unit, three RGB sub-pixels do not need to be divided, three-color light sources do not need to be matched, color display can be achieved, cost and power consumption are reduced, an