Seoul Biosys (affiliate of Seoul Semiconductor), a global optical semiconductor company, has filed a patent infringement lawsuit against Feit Electric (hereinafter “Feit”), the largest home lighting company in the United States, in the United States Federal District Court for the Central District of California.

Seoul Biosys stated in the complaint that "LED lighting products manufactured and sold by Fight infringe on a total of six patented technologies, including the omnidirectional filament LED package jointly developed by Seoul Semiconductor and Seoul Biosys."

One in two light bulbs in a typical household is a filament type.

Previously, filament LED lawsuits were also filed in Europe.

In 2020, the Düsseldorf Court in Germany ruled that products from a Philips lighting affiliate infringed Seoul Semiconductor's patent for improving the light extraction efficiency of filament LEDs, and issued two orders for a permanent sales ban and the recall and destruction of infringing products. Following the ruling, Seoul Semiconductor's filament LED patents will gain significant effect in 18 European countries, including Germany, France, the Netherlands, and Italy, that have joined the Unified Patent Court Agreement following the launch of the United Patent Court in Europe in 2023.

Seoul Semiconductor has invested more than 10% of its sales in optical semiconductor R&D over the past 30 years and developed second-generation LED technology, and holds an overwhelming 18,000 patents in the LED industry.has

In particular, it has the LED 'WICOP' technology that does not require wires, which is essential for producing Micro LEDs.

Seoul Semiconductor has been working to respect intellectual property rights by winning all 102 lawsuits filed in 8 countries over the past 20 years to create a society where “birth is unfair but opportunity is fair.”

Related stories have appeared in The Wall Street Journal and the Financial Times.

Meanwhile, the 'Unified Patent Court' system was launched in Europe on June 1, 2023. Unlike the existing European patent system, which goes through validation procedures in each country after the patent is granted and has the effect of the patent in each country, if a judgment for patent infringement sales prohibition and damages is received, the effect will occur simultaneously in 18 European countries, including Germany, France, and Italy.