Reference voltage generation circuit, display driver circuit, display device, and method of generating reference voltage

摘要

A reference voltage generation circuit includes first to third resistance ladder circuits. The first resistance ladder circuit has at least one variable resistance circuit in which a resistance value between both ends is variable, and outputs multi-valued reference voltages. The second resistance ladder circuit has series-connected resistance circuits each of which has a fixed resistance value, and outputs a plurality of reference voltages. The third resistance ladder circuit has at least one variable resistance circuit in which a resistance value between both ends is variable, and outputs multi-valued reference voltages. The first to third resistance ladder circuits are connected in series between first and second power supply lines. The resistance values of the variable resistance circuits in the first and third resistance ladder circuits are variably controlled by a given command or a variable control signal input through an external input terminal.