An image display apparatus for displaying gray-scale images by writing display information to an image display area of a panel. The wavelength selective detector includes an etalon, first and second collimating optical elements, and first and second optical detectors. The side walls of the upper insulating layer are then isotropically etched, using the above mask again, to expand the size of the opening. One or more name servers map a file name into the file identifier referenced by the file name. The present invention further relates to the use of BET protein inhibitors in viral infections, in neurodegenerative disorders, in inflammatory diseases, in atherosclerotic disorders and in male fertility control.