Samsung has filed a patent invalidation lawsuit against LG in an intellectual property (IP) tribunal in their homeland.The former now asks the tribunal to invalidate several LG OLED patents and consequently drop the patent infringement case.

In early September, Samsung claimed LG stole its company secrets by luring former Samsung employees to join LG. Later that month, LG claimed in a lawsuit that five Samsung devices, including the Galaxy S and the Galaxy Tab, infringed its OLED patents.

Additionally, Samsung and LG have been bitter rivals even before smartphones enveloped the consumer market. For several years, both companies have made OLED display technology a popular choice of major OEMs in smartphone screens because of its low power consumption and bright color intensity.