A display board has wirings on a surface thereof for transmitting a signal received from outside at a peripheral portion of the display board to a display area of the display board. Each wiring has a first conductive film formed of a first material and disposed on the surface of the display board, a...http://www.google.com/patents/US5608559?utm_source=gb-gplus-sharePatent US5608559 - Display board having wiring with three-layered structure and a display device including the display board
