Seoul Semiconductor reported on Dec. 8 that it successfully invalidated Enplas’ three patents for technologies in back light unit (BLU) lens for TVs. Seoul Semiconductor reported on Dec. 8 that it won its case against Japanese company Enplas in the United States. On September 11, 2015, the U.S. Patent Tribunal ruled to invalidate both patents and claims of Enplas’ display backlight unit lens. The ruling cited no novelty and creativity. The U.S. Patent Tribunal also invalidated two other Enplas lens patents on Oct. 11 for the same reason, according to a Business Korea article.
On July 2014, Seoul Semiconductor filed a lawsuit against the Toronto-based electronics company Curtis, and U.S.-based LED television manufacturers Craig Electronics. The lawsuit alleged that the companies stole Seoul Semiconductor’s key lens and structural technologies, including backlight unit (BLU) technology for liquid crystal displays, and epitaxy, chip, and package technology.
In July of 2015, the U.S. Federal Court found that Craig violated its patents. On Dec. 5, Curtis agreed to respect Seoul Semiconductor’s patents and to pay royalties on the patents related to Epi, chip, package and BLU technology for LCDs.