| 摘要 |
PURPOSE: To make a displayed image easily visible even through the image is visible from points other than the eye point at the driver's seat by providing an enlarging optical means whose enlargement ratio in the right-and-left direction and the up-and- down direction of the displayed image is in a specified range. CONSTITUTION: A virtual image obtained by enlarging the display screen 12 of a display unit 11 to 1.6-fold one in the up-and-down direction and 2.5-hold one in the right-and-left direction by a concave mirror 15 and a cylindrical lens part 14 is formed. Since the displayed image 20 is visible from a driver's seat position on the position of the eye point P is enlarged to 1.6-fold one in the up-and-down direction and 2.5-fold one in the right-and-left direction. high-quality display can be performed with wide feeling and the displayed image can be very easily visible. When the image is visible recognized from a passenger seat, the image 20 is visible from an inclined direction with respect to an optical axis 15a, so that the distortion of the image 20 is visible in a state where it is enlarged; however, the distortion in the up-and-down direction is restrained small because the image 20 is enlarged to 1.6-fold one in the up-and-down direction. The image 20 is enlarged to 2.5-fold one in the right-and-left direction, so that the distortion is enlarged in the right-and-left direction, but it does not matter because it is corrected by the work of the brain. |
