O2Micro's Free Dimming(TM) Technology Patent Continued

It allows the end-user to toggle dimming control using any standard on/off wall switch.

GEORGE TOWN, Grand Cayman, Feb. 13,2013--O2Micro(R)

International Limited (Nasdaq:OIIM), a global leader in the design,
development and marketing of high-performance integrated circuits and
solutions, today announced that it was issued 20 claims under United States
patent number 8,305,013 for its Circuits and Methods for LED Free
Dimming(TM) control; a continuation of the invention issued February 2012
under United States patent number 8,111,017.

Free Dimming is O2Micro's dimming technology built into a LED light source.
It allows the end-user to toggle dimming control using any standard on/off
wall switch.

"This patented technology enables dimming control in LED lighting using an
ON/OFF wall switch. The technology saves the cost of installation and
compatibility issues associated with traditional incandescent dimmers," said
Dr. Yung Lin, executive vice president at O2Micro.

About O2Micro

Founded in April 1995, O2Micro develops and markets innovative power
management components for the Computer, Consumer, Industrial, Automotive and
Communications markets. Products include LED General Lighting, Backlighting,
Battery Management and Power Management.

O2Micro International maintains an extensive portfolio of intellectual
property with 22,390 patent claims granted, and over 24,000 more pending.
The company maintains offices worldwide. Additional company and product
information can be found on the company website at www.o2micro.com.

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