A pixel array including scan lines, data lines and pixels is provided. The data lines and the scan lines are intersected so as to define sub-pixel regions arranged in array. Each pixel is disposed in a pixel region including (m×n) sub-pixel regions, wherein m is a positive integral and n is a positive integral larger than one. Each pixel includes a plurality of sub-pixels, wherein each sub-pixel includes an active device, a pixel electrode and a storage capacitor. At least a portion of the storage capacitors of the sub-pixels within the same pixel is concentrically disposed in one of the sub-pixel regions.