Referring to FIGS. 5A and 5B, the color conversion panel 200 (e.g., the color conversion layer 270) includes a surface(s) opposite a surface(s) of the light emitting panel, i.e., the color conversion panel 200 of the embodiment faces the light emitting element 180 of the light emitting panel 100. The color conversion panel 200 (e.g., color conversion layer 270) of an embodiment may include at least one color conversion region for converting an emission spectrum of light supplied from the light emitting panel 100 into light of a different emission spectrum. The color conversion region may, for example, convert light in the emission spectrum supplied from the light emitting panel 100 into light in the emission spectrum of the color displayed by each of the sub-pixels PX1, PX2, and PX3. The color conversion panel 200 of an embodiment may further include an upper substrate 210, a light blocking pattern or a black matrix 220, a color filter layer or a first optical device 230, a planarize layer 240, a partition wall 250 (250a and 250b), the color conversion layer 270 (270a, 270b, and 270c), an encapsulation layer 290, or a combination thereof.
