摘要：【中文】本发明公开了一种抬头显示装置、抬头显示仪及车辆，抬头显示装置包括：光源、偏振转换件和第一偏光片，光源发射第一偏振光线；偏振转换件具有远离光源的第一位置和靠近光源的第二位置；第一偏光片设置于光源出射光线的光路中；偏振转换件处于第一位置，第一偏振光线未经过偏振转换件，第一偏振光线偏振状态未改变，第一偏振光线射向第一偏光片发生反射；偏振转换件处于第二位置时，第一偏振光线经过偏振转换件，第一偏振光线偏振状态发生改变，第一偏振光线经过偏振转换件发射出第二偏振光线，第二偏振光线射向第一偏光片发生透射。本发明的技术方案能够有效避免整体移动投影模组，并且其结构简单。 【EN】The invention discloses a head-up display device, a head-up display instrument and a vehicle, wherein the head-up display device comprises: the light source, the polarization conversion piece and the first polarizer, the light source emits the first polarized light; the polarization conversion member has a first position away from the light source and a second position close to the light source; the first polaroid is arranged in a light path of emergent light of the light source; the polarization conversion part is positioned at a first position, the first polarized light does not pass through the polarization conversion part, the polarization state of the first polarized light is not changed, and the first polarized light emits to the first polarizer to be reflected; when the polarization conversion part is located at the second position, the first polarized light passes through the polarization conversion part, the polarization state of the first polarized light is changed, the first polarized light transmits second polarized light through the polarization conversion part, and the second polarized light irradiates the first polarizer to be transmitted. The technical scheme of the invention can effectively avoid moving the projection module integrally and has simple structure.