Realtek Semiconductor Corp's lawsuit, lodged in California, accuses MediaTek of conspiring with IPValue Management Inc in an effort to drive Realtek out of the market and monopolise the industry for chips used in smart televisions and set-top boxes.

In a statement to the Taiwan stock exchange, MediaTek said the case was in the process of being litigated and it will submit evidence and defend itself against the accusations.

It added that the litigation has no significant impact on the company.

(Reporting by Ben Blanchard; Editing by Christopher Cushing)