Projection optical system and head-up display device of automobile

Abstract

An 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 projection optical system comprises an image generation unit, a first reflection unit, a double-telecentric lens, 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 used for controlling the images emitted by the image generation unit and light emitted by the light splitting device ina time-sharing mode, wherein the light splitting device is arranged on the image plane of the double-telecentric lens; and the controller is configured to control the reflective side of the light splitting device to emit light when the controller controls the image generation unit to emit the first image, and controls the light transmitting side of the light splitting device to emit light when theimage generation unit is controlled to emit the second image, so that the first image and the second image are emitted and imaged through the first lens and the second lens. According to the projection optical system provided by the embodiment of the invention, different display contents and pictures can be respectively realized at two different positions in a sequential control mode, and the projection optical system is small in size and low in cost.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of projection optics, and in particular to a projection optics system and a head-up display device for an automobile. Background technique [0002] HUD refers to the head-up display through the windshield of the car. Nowadays, with the intelligent development of cars, new smart cars are usually equipped with HUD, which allows users to observe the speed, speed limit instructions, and driving routes without looking down at the dashboard. Maps and other vehicle information and road condition information. Among them, AR HUD is the current development trend of HUD. AR HUD is a head-up display device that can display AR images. [0003] In the process of implementing the embodiments of the present invention, the inventors have found that at least the following problems exist in the above related technologies: currently, the HUD installed in the car, that is, the head-up display device, usuall...

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Problems solved by technology

[0003] In the process of implementing the embodiments of the present invention, the inventors have discovered that at least the following problems exist in the above related technologies: currently, the HUD installed in the car, that is, the head-up display device, usually can only display two-dimensional plane images, such as the driving information screen of the car. Or, only AR pictures can be displayed, such as displaying the road condition information pictures collected by the car camera. If two kinds of pictures need to be displayed at the same time, two sets of head-up display devices are required. space to accommodate the HUD

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