HEAD-UP DISPLAY DEVICE AND ILLUMINATING DEVICE FOR HEAD-UP DISPLAY DEVICE

摘要

An image displayed on an image display unit is illuminated by an image illumination unit, and the image is displayed for a driver using a display optical system having at least one concave mirror element. The image illumination unit has a light emitting surface that emits an illumination light, and a lens array that divides and focuses an entrance pupil of an eye box onto the light emitting surface. With the above configuration, since the light emitting surface and the eye box have a conjugate relationship through the lens array and the display optical system, the light emitted from the light emitting surface can efficiently reach the eye box. As a result, since the light can be efficiently used for illumination, the image having high luminance can be displayed without any increase in the luminance of a light source and any reduction in the number of displayable colors.

主权项

1. A head-up display device for displaying an image, as a virtual image, to be superimposed on a view in front of a driver, the head-up display device comprising:
an image display unit that displays the image to be displayed as the virtual image; an image illumination unit that illuminates the image displayed on the image display unit; and a display optical system that has at least one concave mirror element to display the illuminated image as the virtual image for the driver, wherein the image illumination unit includes a light emitting surface that emits light for the illumination, and a lens array disposed between the image display unit and the light emitting surface.