HUD optical path system and head-up display device

The invention discloses an HUD optical path system and a head-up display device, and relates to the technical field of head-up display. The HUD light path system comprises an image generation unit, at least one reflector and a windshield, the reflector and the windshield form a transflective light path, the image generation unit comprises a light source module and a display unit arranged on the light emitting side of the light source module, a first polarizing film is arranged between the light source module and the display unit, and a second polarizing film is arranged between the light source module and the display unit. At least one reflector is provided with a reflecting film, and the reflecting film has a preset reflectivity. The temperature rise of the image generation unit can be prevented from being too high, so that the use reliability and the service life are improved. 本申请公开了一种HUD光路系统及抬头显示装置，涉及抬头显示技术领域。该HUD光路系统包括图像生成单元，以及构成透反射光路的至少一个反射镜和挡风玻璃，所述图像生成单元包括光源模组，以及设置在所述光源模组出光侧的显示单元，其中，所述光源模组和所述显示单元之间设置有第一