A display panel includes a lighting device, a color conversion layer, and a reflective sheet. The lighting device at least includes a first lighting part emitting a first light of a first color having a wavelength within the first wavelength range and a second lighting part emitting a second light of the first color having a wavelength within a second wavelength range. The color conversion layer includes a number of bases corresponding to the first lighting part and the second lighting part. The reflective sheet reflects a light having a wavelength within a first wavelength range and lets a light having a wavelength out of the first wavelength range to pass through. The bases corresponding to the first lighting part are doped with a number of quantum dot particles to convert the first light to a third light of a second color.