Source Driver Including Output Buffer, Display Driving Circuit and Operating Method of Source Driver

The method of operation of the source driver comprises an output buffer, a display drive circuit and a source driver are provided. The source driver according to embodiments of the present invention, an output driver corresponding to a plurality of data lines including a plurality of buffers, each buffer output amplifier unit and a driving signal to the data line for amplifying the input signal buffer and charge-sharing operation, and comprising a switch that includes one or more charge-sharing switches for electrically connecting the plurality of data lines, the amplification unit comprises: a first current with a reference current path and the output current path mirror containing the it included, and the second node of the first node and the output current path of the charge-sharing operation when the reference current path being electrically connected to each other.