SFC, the joint venture between Samsung Display and Japanese chemical firm Hodogaya, has succeeded in nullifying a patent related to deuterium used in OLED in South Korea.
The patent in question is co-owned by LG Display and Material Science, and was canceled in a ruling by the Intellectual Property Trial and Appeal Board in June.
SFC had filed a request to the board to have the patent, called 2277303 and concerning organic field-effect emitting device, canceled in January.
The patent deals with deuterium, one of two stable isotopes of hydrogen and a material used to increase the life of OLED devices.
LG Display had said late last year that it plans to apply deuterium technology to all its large OLED panels starting this year.
The company even has a brand called OLED.EX, an OLED panel with 30% increased brightness thanks to the use of deuterium.
However, a family patent of 2277303 called 2136806, which also relates to deuterium, is still registered. The patent’s owners are also LG Display and Material Science and registered back in July 2020.
LG Display had already filed the patent that was canceled in South Korea in the US and China.