本文档为DP官方1.4版协议标准，内容详尽。DP的资料相当难得，很难搜索到这么详尽的官方协议资料。 The DisplayPort standard specifies an open digital communications interface for use in both internal connections, such as interfaces within a PC or monitor, and external display connections. Suitable external display connections include interfaces between a PC and monitor or projector, between a PC and TV, or between a device such as a DVD player and TV display.