Data generator and display driver including the same

The data generator includes an overdrive data generation unit and the buffer. Overdrive data generation unit generates the overdrive data based on previous display data and the first current display data. Buffer unit first provides a second current display data received in the current display data before a previous display data in the over-drive data generating unit, and a first receive the current display data and overdrive data, and the first current display data and over and it outputs the drive data. Data generator according to the present invention can increase the driving speed of the load which is connected to the display driver by using the overdrive voltage corresponding to the overdrive data. When the load is connected with the display driver driving speed increases, it is possible to increase the operation speed of the display device.