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15 August 2007


AOT loses Taiwan patent invalidation action against Seoul Semiconductor

The Taiwan Intellectual Property Office has dismissed a patent invalidation action filed by Taiwan’s Advanced Optoelectronic Technology Inc (AOT) relating to the white LED patent in Taiwan of rival Seoul Semiconductor Co Ltd (SSC), which is the largest LED maker in Korea and one of the ten largest worldwide.

According to SSC, AOT has been infringing on SSC’s patent on a white LED manufacturing method in Korea since 2002. In August 2005 a judge in the Seoul Central District Court ruled that AOT had infringed SSC’s white LED patent technology. In November 2006, the Intellectual Property Tribunal in Korea turned down AOT’s claim to invalidate SSC’s Korean patent registration.

SSC says that it has also won cases pertaining to its white LED patent against Itswell and Mediana Electronics in Korea.

SSC says that its white LED patent technology can be applied to high-efficiency LEDs for flash, general lighting, automotive and mobile-handset keypads. The firm has already completed the registration process for its patents in countries including Japan, Taiwan, China and the USA.

See related items:

Seoul’s new flash LED to replace xenon lamps in digital cameras

Nichia sues Seoul Semiconductor's Japanese subsidiary over white LEDs

Seoul Semiconductor unveils 42lm/W warm-white Acriche