A pixel array includes pixel sets. Each pixel set includes a first and second scan lines arranged in parallel on a substrate, a data line not parallel to the first and second scan lines, a first active device electrically connecting the first scan line and the data line, a second active device electrically connecting the second scan line and the data line, a first pixel electrode electrically connecting the first active device, a second pixel electrode electrically connecting the second active device, and an auxiliary electrode pattern that includes a connecting portion and a first and second branch portions. A gap is between the first and second pixel electrodes. The connecting portion underneath the gap between the first and second pixel electrodes partially overlaps the first and second pixel electrodes. The first and second branch portions connect the connecting portion and partially overlap the first and second pixel electrodes, respectively.