Difference between LVDS SerDes and FPD-Link III SerDes?
Actually, what you call as &quot;LVDS SerDes&quot;, is actually the first generation FPD-Link. It defines how parallel video data is serialized with the clock in the SerDes, and the resulting signals are sent over a DC coupled LVDS electrical interface.
Second generation FPD-Link just used higher bit rates and embeds the clock in the data stream and supports AC coupling, so singe twisted pair could replace complete first generation FPD-Link.
Third generation FPD-Link change from LVDS to CML electrical interface to use even higher bit rates, and it also supports bi-directional communications, so no extra wiring is necessary for a display interface, so panel information can be read via I2C for example.
So, in short, you are comparing first-gen and third-gen FPD links. Newer tech allows faster rates over less wires and bidirectional communications for status and control