Head-up display device

Abstract

The invention discloses a head-up display device which comprises a waveguide and at least two light machines, the waveguide comprises a coupling-out area and at least two coupling-in areas, the coupling-in areas are used for enabling light rays emitted by the light machines corresponding to the coupling-in areas to enter the waveguide, and the coupling-out areas are used for enabling at least part of the light rays from the coupling-in areas to be coupled out of the waveguide. Light rays projected by the light machines are emitted out of the waveguide through the coupling-out area of the waveguide, and the light rays correspondingly coupled by the light machines converge to form an image output by the head-up display device. According to the head-up display device, the image brightness is improved by using the multiple light machines, and compared with the prior art, the power consumption can be prevented from being greatly increased.

Description

technical field [0001] The invention relates to the technical field of virtual reality display, in particular to a head-up display device. Background technique [0002] Head Up Display (HUD) based on virtual reality (Virtual Reality, VR) is a light machine projected light, the light enters the waveguide, the waveguide transmits the light and couples out the light, the light is reflected by the windshield and enters the The human eye, which allows the human eye to see a virtual image located at infinity. [0003] In the prior art, due to the waveguide itself, its light efficiency is low, which will lead to low brightness of the image, and when the external ambient light is strong, the user cannot distinguish the image well. Theoretically, the brightness of the image can be improved by increasing the power of the light engine, but the power increase is not proportional to the brightness increase. If the brightness is doubled, the power may need to be increased by 1.5 times or...

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Problems solved by technology

[0003] In the prior art, due to the waveguide itself, its light efficiency is low, which will lead to low brightness of the image. When the external ambient light is strong, the user cannot distinguish the image well.

Theoretically, the brightness of the image can be improved by increasing the power of the light engine, but the power increase is not proportional to the brightness increase. If the brightness is doubled, the power may need to be increased by 1.5 times or more, and the corresponding heat dissipation equipment will also increase. In the end, the entire head-up display device product is large in size and high in power consumption, which is very unfriendly to the future automobile market dominated by electric vehicles

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