| 摘要 |
PURPOSE: A head up display device for a vehicle is provided to prevent the damage of a display device and the contrast decline by controlling the brightness of the image displayed on a display device and blocking the outside ultraviolet ray by using a DA(Dynamic Aperture). CONSTITUTION: A head up display device for a vehicle is composed of a display device(120), a mirror(140), and a light intensity controller(110). The display device indicates the driving image information of a vehicle. The mirror forms the virtual image by projecting the driving image information displayed on the display device to a driver. The light intensity controller is positioned between the display device and the mirror, and dynamically controls the transmittance of the ultraviolet ray flowed in from the outside of a vehicle to the display device and the light flowed out from the display device.
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