Patent ID: 7880689

Claim:
The drive circuit of a display device using a capacitive load, comprising: a clamp circuit connected to a power source potential and clamping a potential of the capacitive load to the power source potential such that an electric power is supplied to the capacitive load, wherein said clamp circuit selectively performs an electric power dispersion clamp in which the potential of the capacitive load is clamped to the power source potential such that the electric power is supplied to the capacitive load in a temporally dispersed manner, and an electric power concentration clamp in which the potential of the capacitive load is clamped to the power source potential such that the electric power is supplied to the capacitive load in a temporally concentrated manner, and said clamp circuit selects the electric power dispersion clamp or the electric power concentration clamp in accordance with a display ratio showing a proportion of a number of display pixels.