South Korea's LG Electronics said Monday it has filed a patent lawsuit against Japan's Hitachi in a prolonged tit-for-tat legal battle over plasma display panel (PDP) technology.
LG Electronics said in a statement the lawsuit was filed with the US District Court of Texas against Hitachi, its US affiliate and its PDP unit. It is a countersuit following similar action by the Japanese firm. The countersuit accuses the Japanese firms of infringing LG Electronics' seven PDP-related patents. It seeks a court injunction against them and monetary compensation.