1. If your external display can be directly connected to the computer, then you only need to have a graphics card with dual head display or buy a split screen.
2. If your external display uses a special interface and cannot be directly connected to the computer, in principle you need to know all its parameters and make a transfer interface. But in general, the transfer interface should be provided directly where you buy it.
3, now the large size of the display is very cheap, it is recommended that you buy the display directly as Gu Xian, compared to other displays, cheap and simple to implement, customers look comfortable.