| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a virtual image display device capable of setting the aspect ratio of image light entering the eyes of an observer as a virtual image to a desired state while fulfilling design limitations to some extent. <P>SOLUTION: An inventive virtual image display device 100 can convert the aspect ratio of a formed virtual image into the aspect ratio (16:9) laterally longer than the original aspect ratio (4:3) of the image area of an image display element 11 by means of expansion conversion in an aspect ratio conversion optical system 15. Thus, the aspect ratio of image light to be recognized as a virtual image by the eye of the observer can be adjusted to a desired state (e.g., the aspect ratio of 16:9) by the aspect conversion in the cylindrical lenses 15a, 15b even in the case in which, for example, the lateral width WD of an image forming device 10 including the image display device 11 with respect to the whole of the virtual image display device 100 is limited by a design requirement and therefore the image area fails to have a relatively landscape aspect ratio (e.g., 16:9) required as a picture, but has a ratio approximating square (e.g., the aspect ratio of 4:3). <P>COPYRIGHT: (C)2012,JPO&INPIT |
