LED flying at the black sky light book

Recently, the night sky of North Beach in San Francisco has been lit up by a lot of "flying" books in the sky. This is called "birds" (Language of the Birds) device art, not only the waves of people's emotions, also let the technology seems to be poured out of the feelings, it combines the book image and LED issued by the white heat, so that the original book is so intense darkness without light, one after another made an intellectual light, also let the ordinary night odd square, add a lot of cultural atmosphere. Source: addiction Technology