Patent ID: 7068292

Claim:
A display driver circuit for driving a signal electrode based on grayscale data of (a+b) bits (a and b are positive integers), the display driver circuit comprising: a precharge circuit which sets an output electrode electrically connected to the signal electrode at a precharge voltage in a first period within a drive period; a voltage select circuit which sets the output electrode which has been set at the precharge voltage at a reference voltage based on the grayscale data; and a drive voltage adjusting circuit which adjusts a voltage of the output electrode by using the grayscale data, the output voltage having been set at the reference voltage, wherein: the drive voltage adjusting circuit includes a first transistor and a second transistor; a source terminal and a drain terminal of the first transistor are respectively connected to a first power supply line to which a first power supply voltage is supplied and the output electrode; a source terminal and a drain terminal of the second transistor are respectively connected to a second power supply line to which a second power supply voltage is supplied and the output electrode; and a gate signal is applied to a gate electrode of one of the first and second transistors, the gate signal having a pulse width determined based on low order “b” bit(s) or the low order “b” bit(s) and at least part of high order “a” bit(s) in the grayscale data of (a+b) bits.