Feb 25, 2021

GEORGE TOWN, Grand Cayman, Feb 25, 2021 (GLOBE NEWSWIRE) -- O₂Micro ® International Limited (NASDAQ Global

Select Market: OIIM), a global leader in the design, development and marketing of high-performance integrated circuits and

solutions, today announced the grant of a patent of a key system and method for driving a light source.

O₂Micro was issued 37 claims under US U.S. Patent No. 10,893,591 on Jan 12, 2021 for the invention of a system for driving a light

source including a power converter and control circuitry. The control circuitry generates a control signal based on the voltage

feedback signal indicative of a combination of the output voltage, current and the light source and controls the power converter.

UK claims are patent pending.

Dr. Yung Lin, Executive Vice President, O2Micro, commented, "This invention provides a cost-effective solution to the system power

management where both regulated DC output and LED driver are present."

About O2Micro:

Founded in April 1995, O2Micro develops and markets innovative power management components for the Computer, Consumer,

Industrial and Automotive markets. Products include Backlighting and Battery Management.

O₂Micro, the O₂Micro logo, and combinations thereof are registered trademarks of O₂Micro. All other trademarks or registered

trademarks are the property of their respective owners.

Contact Information:

O2Micro Daniel Meyberg

Investor Relations