Toyoda Gosei Co., Ltd. announced today that it has filed a patent infringement lawsuit against Nichia Corporation in the Osaka District Court seeking injunction against Nichia Corporation's manufacturing, use, sale and offering for sale of the gallium nitride-based Blue LED

The patent, Japanese Patent No. 3026102, entitled "A Light-Emitting Gallium Nitride-Based Compound Semiconductor Device", relates to a basic composition of a LED device allowing the actuating voltage of the light-emitting device to decrease and light-emitting efficiency to be improved.

Toyoda Gosei alleges in its complaint that Nichia Corporation is infringing the 3026102 patent by manufacturing, sale and offering for sale of the gallium nitride-based Blue LED in Japan.

Toyoda Gosei has been developing Blue LED as a pioneering enterprise ahead of Nichia Corporation, and is one of the largest Blue LED manufacturers in the world. Toyoda Gosei has been litigating against Nichia Corporation with respect to a number of patents and utility model rights, and will continue to enforce its intellectual property rights