https://blog.wongcw.com/2021/02/17/%e8%98%8b%e6%9e%9c%e5%85%ac%e5%8f%b8%e7%8d%b2%e5%be%97%e6%9c%80%e6%96%b0iphone%e9%a1%af%e7%a4%ba%e5%b1%8f%e5%b0%88%e5%88%a9%e5%88%b7%e6%96%b0%e7%8e%87%e6%9c%80%e9%ab%98%e5%8f%af%e9%81%94240hz/