Head up display

Abstract

The invention belongs to the technical field of vehicle-mounted electronic devices, and discloses a head up display device. The head up display comprises an imaging source, a first reflector, a second reflector and a first lens, wherein the first reflector and the second reflector successively reflect an image output by the imaging source; and the first lens is arranged on a reflection light path of the second reflector and used for correcting aberration. The imaging source can axially reciprocate along a central shaft of an output face of the image. The optical distance between the imaging source and the first lens is smaller than the focal distance of the first lens. According to the invention, aberration such as astigmatism and distortion can be effectively corrected via the first lens; the first reflector and the second reflector are combined to fold light paths, thereby achieving clear imaging. By adjusting the axial position of the imaging source, the image distance can be adjusted, so the head up display can be fit for different driving environments. In the transmission-type imaging way, aberration such as astigmatism and distortion can be effectively corrected; a quite big clear virtual image can be obtained even by a quite small imaging source; the head up display can be installed on a narrow center console; and the difficulty to take both the small size and big images into consideration is solved.

Description

technical field [0001] The invention belongs to the technical field of vehicle-mounted electronic equipment, and in particular relates to a head-up display device. Background technique [0002] As we all know, the head-up display is mainly to allow the driver to focus on driving without looking down at the information on the instrument panel. The desired information can be obtained from the virtual image of the head-up display in front of the field of vision, so as to avoid focusing on the instrument panel belt when the car is driving. driving safety issues. In different environments, such as driving on a highway, the driver's field of vision becomes longer and longer when driving a car; while on a busy and congested road, the driver's field of vision becomes shorter and closer. Therefore, an ideal head-up display hopes to be able to adjust the distance of the virtual image according to different road conditions, so that the driver can easily observe and prevent eye fatigue...

AI Technical Summary

Problems solved by technology

In order to realize the long-distance projection of virtual images, the volume of the head-up display will become larger and larger. However, the space of the center console is limited, which is not suitable for the installation of front-loading vehicles, and it is difficult to meet the large-scale installation in the limited installation space. Requirements for Clear Imaging

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