Patent ID: 7375713

Claim:
A data driver for driving data lines of an electro-optic device, comprising: a state setting register that stores setting data for one of multiple states, the multiple states including a display ON state where drive power is generated and display operation is conducted using drive signals based on display data, a display OFF state where the drive power is generated but display operation using the drive signals is not conducted, and a sleep state where the drive power is not generated and display operation using the drive signals is not conducted; a state setting circuit that outputs drive control signals based on the multiple states, the state setting circuit controlling transition to any of the multiple states in accordance with the setting data stored in the state setting register; and a drive circuit that drives the data lines with the drive power based on the drive control signals, the state setting circuit controlling transition from the sleep state to the display OFF state when first setting data of the setting data is received by the state setting register during the sleep state, and the state setting circuit controlling transition from the sleep state to the display OFF state and then controlling transition from the display OFF state to the display ON state when second setting data of the setting data is received by the state setting register and the first setting data is then received by the state setting register during the sleep state.