초록 ▼

A heads-up display unit provided with a display device serving as display image forming means which displays a display image. A hologram serves as a reflecting means, and reflects the display light emitted from the display device, causing reflection of the display image on the interior surface of a

A heads-up display unit provided with a display device serving as display image forming means which displays a display image. A hologram serves as a reflecting means, and reflects the display light emitted from the display device, causing reflection of the display image on the interior surface of a vehicle's windshield. A display image is formed outside the windshield towards the front of the vehicle. A concave mirror having a different focal length in different directions is recorded in the hologram serving as a reflecting means so as to offset distortion of the display image caused by curvatures of the windshield. This construction makes it possible to cause the windshield to display a display image free from distortion.

대표청구항 ▼

[ What is claimed is:] [1.] An image display unit comprising:image forming means for forming a display image;reflecting means for reflecting light emitted from said image forming means; anddisplay means for forming said display image from light emitted from said image forming means and reflected by

[ What is claimed is:] [1.] An image display unit comprising:image forming means for forming a display image;reflecting means for reflecting light emitted from said image forming means; anddisplay means for forming said display image from light emitted from said image forming means and reflected by said reflecting means, said display means having a first curvature in a first direction and a second curvature in a second direction perpendicular to said first direction, said first curvature being smaller than said second curvature,wherein said reflecting means is provided between said image forming means and said display means, and has optical characteristics of a concave mirror with a curvature being larger than zero in any direction, said reflecting means having a third curvature in a third direction optically parallel to said first direction and a fourth curvature in a fourth direction optically parallel to said second direction, said third curvature of said reflecting means being larger than said fourth curvature thereof so as to offset distortion of said display image caused by said first and said second curvatures of said display means.