A display device includes an insulating substrate, barriers surrounding predetermined regions on the insulating substrate, wherein ink composition is supplied in the predetermined regions, the ink composition including a first solvent which remains in a solid state in a temperature range between 10° C. and 30° C., a second solvent which remains in a liquid state in a temperature range between 10° C. and 30° C., and an organic material, and an organic layer formed in the predetermined regions by volatilizing the first solvent and the second solvent. Thus, the present invention provides a display device with an organic layer of regular quality.