| 摘要 |
An image display apparatus includes: an image display unit for forming an optical image; and an outer housing for housing the image display unit. The outer housing includes a window for displaying the optical image to the outside. The image display apparatus includes, in the outer housing, a heat insulator placed so as to surround the image display unit and a cooling device for cooling inside the outer housing, and the cooling device has a variable cooling capacity. The image display apparatus is abatable to changes in the ambient temperature and the internal power consumption and the presence or absence of sunlight and can be installed in a variety of outdoor environment, so that a high degree of reliability can be achieved.
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