A pixel array is disposed on a first substrate and comprises a pixel having a first electrode layer including a plurality of electrode portions. A light-blocking layer is disposed on a second substrate along a first direction and includes a first light-blocking portion and a second light-blocking portion. The first electrode layer is between the first light-blocking portion and the second light-blocking portion. The first light-blocking portion has a first edge away from the first electrode layer, and the electrode portions include a first electrode portion adjacent to the first light-blocking portion. A brightness distribution of the pixel along the first direction has a first maximum brightness corresponding to a first position on the second substrate. PTB denotes the minimum width from the first position to the first edge, Px denotes the width of the pixel along the first direction, conforming to the following equation: 3.9 + 77.1 ⁢ e - Px 2.7 + 4.5 ⁢ e - Px 34.3 + 0.5 ⁢ e - Px 0.1 ≦ PTB ≦ 8.9 + 77.1 ⁢ e - Px 2.7 + 4.5 ⁢ e - Px 34.3 + 0.5 ⁢ e - Px 0.1 .