The embodiment of the invention relates to the technical field of projection optics, and discloses a projection optical system applied to a head-up display device of an automobile. The system comprises an image generation unit, a first reflection unit, a light splitting device, a first lens, a second reflection unit and a second lens which are sequentially arranged according to a light emitting direction; and a controller which is connected with the image generation unit and the light splitting device and used for controlling the images emitted by the image generation unit and light emitted bythe light splitting device in a time-sharing mode, wherein the controller only controls the light reflection side of the light splitting device to emit light when controlling the image generation unit to emit the first images, so that the first images are emitted and imaged through the first lens; and the controller only controls the light-transmitting side of the light splitting device to emit light when controlling the image generation unit to emit the second image, so that the second image is emitted and imaged through the second lens. The projection optical system provided by the embodiment of the invention can realize different display contents and pictures at two different positions in a time sequence division control mode; the size is small and the cost is low.
本发明实施例涉及投影光学技术领域,公开了一种应用于汽车的抬头显示装置的投影光学系统,包括按出光方向依次设置的图像生成单元、第一反射单元、分光装置、第一镜头、第二反射单元和第二镜头,以及与图像生成单元和分光装置连接的控制器,用于分时序控制图像生成单元所出射的图像和分光装置的出光,控制器在控制图像生成单元出射第一图像时仅控制分光装置的反光侧出光,以使第一图像通过第一镜头出射成像,且控制器在控制图像生成单元出射第二图像时仅控制分光装置的透光侧出光,以使第二图像通过第二镜头出射成像,本发明实施例提供的投影光学系统通过分时序控制的方式能够在两个不同的位置分别实现不同的显示内容和画面,且体积小、成本低。
Projection optical system and head-up display device of automobile
一种投影光学系统及汽车的抬头显示装置
2021-03-26
Patent
Electronic Resource
Chinese
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