Seoul Semiconductor files patent infringement lawsuit in Germany asserting infringement of its high-power LED technology

On March 31, 2017, Seoul Semiconductor Co., Ltd (Seoul) filed a patent infringement lawsuit in Germany in the District Court of Düsseldorf against Mouser Electronics Inc. (Mouser), a global electronic components distributor, asserting infringement of an LED patent.

According to the complaint, the infringement involves products from Mouser – LEDs for high-power light emission – manufactured by multiple LED companies, including Everlight Electronics Co., Ltd, a global top-10 LED maker. In the lawsuit, Seoul has sought a permanent injunction, damages, and recall and destruction of the alleged infringing products.

The asserted patented technology serves to efficiently extract light emitted from the internal LED structure by treating LED chip surfaces, thereby significantly improving light intensity and brightness. This patented technology has been widely used for various high-power LED applications, such as automobile lighting, cell phone flash lights, outdoor lighting, UV LED appliances, and others.

“The asserted patent is considered an essential technology for manufacturing high-power LEDs and has been widely used in various LED applications,” said Ki-bum Nam, Vice President of the Lighting Business Department at Seoul Semiconductor. “Seoul has actively enforced our patent rights against products that infringe high power LED technology. To create fair market competition and promote technological innovation, we continually take actions necessary to deter such infringement and protect our intellectual property,” Nam added.

According to the Institute of Electrical and Electronics Engineers (IEEE), among the companies that exclusively manufacture LED components, Seoul Semiconductor was the only one to be selected in the 2013 Semiconductor Manufacturing Patent Power Ranking. Seoul Semiconductor was also selected for the same category in 2012. IEEE’s patent power scorecards for each industry segment are based on the evaluation of the patent portfolios of more than 5000 leading commercial enterprises, academic institutions, nonprofit organizations, and government agencies worldwide. They take into account not only the size of the organizations’ patent portfolios, but also the quality of their patents with regard to growth index, impact of their patents, originality, and general applicability of the patents.

According to market research firm IHS, the LED penetration rate in automobile headlamps is expected to increase sharply to 32.3 % by 2021 from the current penetration rate of 16.4%. This high-power LED technology is already being used for exterior automobile lighting including headlights and daytime running lights. Furthermore, it is expected to become a significant technology for electric vehicles and autonomous vehicles, which require high-power LED lighting with high heat dissipation for energy efficiency.

In addition, this high-power LED technology applies to LEDs for mobile phone flash lights, which require higher light intensity. Because margins for LEDs used in flash applications are higher than those for backlights, this segment of the LED market for mobile phones has still grown steadily despite the overall decline in the IT sector LED market.

Further, this high-power LED technology is widely applicable to general lighting products for outdoor illumination, as well as commercial and industrial lighting systems, because such technology substantially enhances light efficiency and improves the brightness per unit area obtained from the LED. The technology is also widely used in manufacturing UV LEDs for sterilization, purification and curing processes. The UV LED application market is expected to grow rapidly, reaching $800 million by 2020.


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