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Samsung filed the lawsuit in a local intellectual property court, claiming that the seven OLED patents held by LG Display were ineffective because they lacked core innovation.
It is understood that in September this year, LG Display Company sued Samsung, saying that Samsung's five products including Galaxy S series smartphones and tablets infringe its OLED patents.
Unlike LCDs, OLED technology allows manufacturers to create thinner, higher quality screens. Because of this, at a time when TV demand is relatively low, manufacturers are turning to OLED technology. 
Samsung asked the Korean court to determine that LG's seven OLED patents are invalid
A few days ago, Samsung executives said they had filed a lawsuit in court and asked the court to rule that LG Display's seven patent technologies related to OLED were invalid.