Head-up display equipment

Abstract

The invention provides head-up display equipment. The head-up display equipment comprises an image source, a shading structure, a third diffractive optical element, a brightness sensor and one or morereflecting elements, wherein the image source is used for emitting imaging light, and the reflecting element is used for reflecting imaging light; the third diffractive optical element is arranged onat least one side of the image source or the at least one reflecting element; the brightness sensor is arranged on a diffracted light path of the third diffractive optical element; and the shading structure is used for blocking light transmitted to the image source or the reflecting element when receiving a shading signal. According to the head-up display equipment provided by the embodiment of the invention, a shading structure is arranged in the head-up display body; under normal conditions, the shading structure does not affect normal imaging of the head-up display equipment; when shadingis needed, the shading structure can block an external light path or change an imaging light path to prevent external light from directly entering the image source, and the image source can be prevented from being burnt out due to the fact that the external light is too strong.

Description

technical field [0001] The present invention relates to the technical field of heads-up displays, in particular to a head-up display device. Background technique [0002] HUD (head up display, head-up display) can be imaged (virtual image) by using the windshield of the car, so that the head-up display can project an image containing instrument panel information, and the driver can watch the real environment outside the windshield at the same time. The imaging of the head-up display can avoid the distraction caused by the driver looking down at the dashboard during driving, which can improve the driving safety factor and bring a better driving experience. [0003] There is an image source inside the traditional HUD. When strong external light is incident on the image source, the temperature of the image source will rise, which may affect the normal operation of the image source. In addition, HUDs generally have curved mirrors, and the image source is close to the focal plan...

AI Technical Summary

Problems solved by technology

However, when there is strong light (such as sunlight) outside the vehicle, the external light can pass through the windshield to reach the curved mirror, and then converge on the focal plane of the curved mirror, causing the converged light spots to burn out the image source, or even Accident caused by vehicle fire

see figure 1 As shown, when the sun is at a certain angle or position, sunlight can pass through the windshield and directly enter the curved mirror 1 of the HUD, making the light converge near the image source 2, which may burn out the image source 2

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