The crowded LED patent landscape.... "More than 7,510 patented inventions related to Phosphors & QDs have been published worldwide" http://www.prnewswire.com/news-releases/phosphors--quantum-dots-for-led-application-patent-landscape-analysis-2016---trends-technologies--opportunities-report---key-vendors-denka-everlight-toshiba---research-and-markets-300246931.html