Patent ID: 6982706

Claim:
A reference voltage buffering circuit provided in a source driver circuit for driving a liquid crystal element of a liquid crystal module, wherein: the reference voltage buffering circuit comprises two buffering circuits arranged in parallel to each other between an input-side node for receiving an externally produced reference voltage as an input voltage and an output-side node for sending out an output voltage; and each buffering circuit of the two buffering circuits includes: an operator for receiving the input voltage at one terminal and an output voltage of the operator itself at the other terminal, and operating so that the output voltage of the operator is substantially equal to the input voltage; a capacitor including a first electrode and a second electrode and capable of storing a charge corresponding to a voltage difference between the input voltage and the output voltage of the operator; a first node connected to the first electrode of the capacitor; a second node connected to the second electrode of the capacitor; a third node for receiving an output signal from the operator; a first switching element provided between the second node and the third node; a second switching element provided between the first node and the input-side node input side of the operator; a third switching element provided between the first node and the output-side node; and a fourth switching element provided between the third node and the output-side node.