In an embodiment, the first pixel PXi(j?1) and the second pixel PXij may receive the first initialization voltage VINT1 via the first contact plug CP1, and the second pixel PXij and the third pixel PXi(j+1) may receive the second initialization voltage VINT2 via the second contact plug CP2. In other words, the first pixel PXi(j?1) and the second pixel PXij may share the first contact plug CP1 with each other, and the second pixel PXij and the third pixel PXi(j+1) may share the second contact plug CP2 with each other. In other words, the first pixel PXi(j?1) and the second pixel PXij may share the first voltage line VL1 with each other, and the second pixel PXij and the third pixel PXi(j+1) may share the second voltage line VL2 with each other.