LG OLED wallpaper signage. This sophisticated wallpaper OLED signage achieves the best possible picture quality, concealing its presence by blending in with the wall. Minimal space is required for installation, which simplifies the construction process. LG’s OLED technology unlocks the new worlds of design flexibility with unbelievably lightweight and slim display. The advantages the OLED display brings are countless from the easier installation to a sleek look.