A transparent thin-film EL display apparatus has a transparent thin-film EL element formed on a glass substrate. A rear substrate consisting of photochromic glass and the glass substrate on which the EL element is formed are disposed facing each other with the EL element located in ...http://www.google.fr/patents/US5757127?utm_source=gb-gplus-shareBrevet US5757127 - Transparent thin-film EL display apparatus with ambient light adaptation means
Transparent thin-film EL display apparatus with ambient light adaptation ...
