Hitachi announced yesterday that it has filed suit against three major Taiwanese monitor manufacturers for patent infringement on its PC monitors.

Those companies are Amtran Technology, Proview Electrics and Tatung along with their affiliates Proview Electrics International Holding, Proview Technology and Tatung of America, respectively. Hitachi is suing them in US District Court of Northern California on June 6.

The suit seeks monetary damages and an injunction prohibiting these manufacturers from unauthorized use of Hitachi's patents in their products and from offering, marketing, or importing them.