ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,669, issued on March 31, was assigned to LG Display Co. Ltd (South Korea).

"Display device including chain units and driving sprockets" was invented by GeunChang Park (Goyang-si, South Korea), ChounSung Kang (Gimpo-si, South Korea) and Daeyun Kim (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A display device includes a display panel, a roller around which the display panel is wound or from which the display panel is unwound, a first spring disposed in the roller, a plurality of chain units connected to the display panel and configured to move the display panel in an upward/downward direction, a plurality of driving sprockets di...