The light blocking pattern 220 may partition each sub-pixel PX1, PX2, and PX3 and be disposed between the neighboring sub-pixels PX1, PX2, and PX3. The light blocking pattern 220 may be, for example, a black matrix. The light blocking pattern 220 may be overlapped with the edges of the neighboring color filters 230a, 230b, and 230c.
The planarization layer 240 may be disposed between the color filter layer 230 and the color conversion layer 270, and may reduce or eliminate a step difference caused by the color filter layer 230. The planarization layer 240 may include an organic material, an inorganic material, an organic-inorganic material, or a combination thereof. The planarization layer 240 may include, for example, an oxide, a nitride, or an oxynitride, for example, silicon oxide, silicon nitride, silicon oxynitride, or a combination thereof, but is not limited thereto. The planarization layer 240 may be one layer or two or more layers, and may cover the entire surface of the upper substrate 210.