A wavelength changing film comprising:
- a plurality of regions separated in rows or in columns, wherein each region of the wavelength changing film has quantum dots corresponding to a predetermined wavelength, and the wavelength changing film comprises a fourth region and at least one region selected from among a first region, a second region, and a third region, the first region having quantum dots for outputting red light, the second region having quantum dots for outputting green light, the third region having quantum dots for outputting blue light, and the fourth region where at least two of the quantum dots for outputting red light, the quantum dots for outputting green light, and the quantum dots for outputting blue light are mixed to output a colored light except for the red light, the green light and the blue light, wherein the at least one selected region and the fourth region are each in a rectangular shape and are disposed to be parallel to each other.