https://blog.wongcw.com/2020/06/29/%e8%8f%af%e7%82%bamate-40%e7%b3%bb%e5%88%97%e7%88%86%e6%96%99%ef%bc%9afhd%e5%88%86%e8%be%a8%e7%8e%87-90hz%e5%88%b7%e6%96%b0%e7%8e%87/