( BW)(CA-O2MICRO)(OIIM) O2Micro(R) Files LCD TV Patent Infringement Lawsuit Against Sony and Rohm


Business Editors/High-Tech Editors


SANTA CLARA, Calif. & GEORGE TOWN, Grand Cayman--(BUSINESS WIRE)--Aug. 1, 2005--O2Micro(R) International Limited (NASDAQ:OIIM) has filed a patent infringement lawsuit in the Eastern District of Texas against both Sony Corporation and Rohm Co., Ltd. of Japan for violation of three patents arising out of sale and importation into the United States of certain Sony LCD TVs and other LCD products containing certain Rohm integrated circuits. The three patents asserted in the infringement suit are U.S. Patent Nos. 6,804,129, 6,501,234 and 6,707,264.

O2Micro will seek enhanced damages for willful infringement of its patented technology and injunctions against importation or sale of these products into the United States.

O2Micro has 18 United States patents related to its Intelligent Inverter technology. Many of these patents include claims covering LCD-based products such as LCD TV, LCD Monitors, notebooks and DVD players.


About O2Micro


Founded in April 1995, O2Micro develops and markets innovative power management and security components and systems for the computer, consumer, industrial and communications markets. Products include Intelligent Lighting, Battery Management, Power Management, SmartCardBus(R) and Security products, such as VPN/Firewall system solutions.

O2Micro International maintains an extensive portfolio of intellectual property with 2,575 patent claims granted and over 5,000 more pending. The company maintains offices worldwide.

Additional company and product information can be found on the company website at www.o2micro.com.


O2Micro, the O2Micro logo, SmartCardBus and combinations thereof are registered trademarks of O2Micro.


Statements made in this release that are not historical, Including statements regarding outcome of pending and future litigation, future litigation filings or direction, O2Micro's or management's intentions, hopes, beliefs, expectations, representations, projections, plans or predictions of the future, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve risks and uncertainties that may cause actual results to differ materially from those set forth in these statements.

Factors that could cause actual results to differ materially include risks and uncertainties such as outcome of pending and future litigation or reduced demand for products of electronic equipment manufacturers which include O2Micro's products due to adverse economic conditions in general or specifically affecting O2Micro's markets, technical difficulties and delays in the developments process and errors in the products. You are also referred to the Form F-1 in connection with the company's initial public offering in August 2000, Form F-3 in connection with the company's public

offering in November 2001 and the annual reports on Form 20-F, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements. The company assumes no obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise.





Joe Lin, 408-987-5920