ALEXANDRIA, Va., June 16 -- United States Patent no. RE50,440, issued on May 20, was assigned to LG Display Co. Ltd. (Seoul, South Korea).
"Organic light emitting display device" was invented by Ki-Woog Song (Goyang-si, South Korea), Chang-Wook Han (Seoul, South Korea), Hong-Seok Choi (Seoul, South Korea), Sung-Hoon Pieh (Seoul, South Korea), Jeong-Dae Seo (Incheon, South Korea), Seok-Joon Oh (Paju-si, South Korea) and Youn-Seok Kam (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "An organic light emitting display device includes a first electrode and a second electrode disposed on a substrate opposite to each other, a first stack including a hole injection layer, a first hole transport lay...