Pixels for three colors, namely, R, G, and B, are arranged in a stripe manner. Two data lines DL are placed in a space between pixel columns for every other pixel column, and a power supply line is placed in a space between the pixel columns, where a data line is not placed. Pixel columns for colors with the best current efficiency and with the least current efficiency share a single power supply line, while pixel columns for colors with intermediate current efficiency share another power supply line.