https://qooah.com/2012/06/15/%e6%9c%89%e5%82%b3-samsung-%e6%ad%a3%e9%96%8b%e7%99%bc%e6%96%b0%e4%b8%80%e4%bb%a3-s-pen-%e8%a2%ab%e6%9b%9d%e5%85%89/