2008-05-05 16:55:03 -

- O2Micro(R) International Limited (NASDAQ:OIIM) (SEHK:0457), a leading supplier of innovative power management, and security components and systems, was issued 20 claims under United States patent number 7,345,431 for its DC/AC Converter circuit architecture; a continuation of the invention issued March 2007 under patent number 7,190,123.

The patented DC/AC Converter circuit architecture drives a plurality of Cold Cathode Fluorescent

Lamps (CCFLs), providing uniform brightness to large LCD panel applications, such as LCD TVs and monitors.

"This patent continuation provides the system designer with a cost effective method to control CCFL brightness uniformity, thereby reducing system costs," remarked Dr. Yung Lin, executive vice president, O2Micro. "In addition, this key patent grant further expands O2Micro's intellectual property coverage for LCD multiple-lamp system applications."

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 9,604 patent claims granted, and over 10,000 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. All other trademarks are the property of their respective owners.

Statements made in this release that are not historical, including statements regarding 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 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.

O2Micro
Gary E. Abbott, 408-987-5920 ext. 8888
Director of Investor Relations
gary.abbott@o2micro.com