Patent ID: 7616221

Claim:
A driver circuit for driving a display device, comprising: a gray-scale-voltage generation unit for generating a plurality of gray-scale voltages, each intended for one of a plurality of gray scales; and a gray-scale-voltage select unit for selecting a gray-scale voltage to be output to each of pixel units employed in a display unit in accordance with input display data, the gray-scale voltage being selected from said gray-scale voltages generated by said gray-scale-voltage generation unit; wherein: each of pixel units employed in said display unit has a transistor and a display element; a source terminal of said transistor is connected to said gray-scale-voltage select unit; a gate terminal of said transistor is connected to a scanning line driving portion for sequentially selecting lines for said pixel units; a drain terminal of said transistor is connected to said display element; said transistor is in an on-state during a scanning period in accordance with a select signal from said scanning line driving portion; said gray-scale-voltage generation unit outputs each gray-scale voltage with levels different from each other during differing fractional time periods of a pixel scanning period, the fractional time period obtained as a result of dividing the pixel scanning period; said gray-scale-voltage select unit selects a gray-scale voltage to be output to each of said pixel units from said gray-scale voltages generated by said gray-scale-voltage generation unit on a time-division basis for each of said pixel units, and uses information of said display data to control length of a time period, during which said selected gray-scale voltage is being output for a pixel unit; and a first one of said fractional time periods obtained as a result of dividing said pixel scanning period is longest among other ones of said fractional time periods.