Driver circuit and operational amplifier circuit used therein

A driver circuit for driving a panel, comprising:

• a first input stage circuit, for receiving a first input signal and amplifying the first input signal to generate a first amplified signal;
• a second input stage circuit, for receiving a second input signal and amplifying the second input signal to generate a second amplified signal;
• a first output stage circuit;
• a second output stage circuit;
• and
• at least one power switching circuit, coupled to the first input stage circuit and the second input stage circuit for switching at least one voltage range of at least one power supply for each of the first input stage circuit and the second input stage circuit, and for switching the first input stage circuit to be coupled to one of the first output stage circuit and the second output stage circuit and for switching the second input stage circuit to be coupled to the other one of the first output stage circuit and the second output stage circuit,
• wherein a full range for the driver circuit comprises a first range and a second range, the first output stage circuit is configured to operate in the first range, and the second output stage circuit is configured to operate in the second range.