Transmittances of red, blue and green filters included in a display device are increased, and in a first field period, after a signal voltage (Vg) is provided to a green sub-pixel (G), a green CCFL is turned on, whereas red and blue CCFLs are turned off. At this time, only light from the green CCFL transmitted through the green sub-pixel (G) is transmitted through a liquid crystal panel. Also, in a second field period, after signal voltages (Vr and Vb) are provided to red and blue sub-pixels (R and B), respectively, the red and blue CCFLs are turned on, and the green CCFL is turned off. At this time, only light from the red and blue CCFLs respectively transmitted through the red and blue sub-pixels (R and B) is transmitted through the liquid crystal panel. Thus, it is possible to provide a display device less susceptible to color purity reduction even if transmittances of color filters are increased.