Pixel unit, array substrate, method for manufacturing array substrate, method for repairing array substrate, and display device

An array substrate comprising a plurality of pixel units, each of which comprises a pixel electrode, a data line, and a TFT configured to apply a display signal from the data line to the pixel electrode, the pixel unit further comprising:

• a backup TFT provided beside the TFT and configured to replace the TFT when the TFT is damaged, a source electrode of the backup TFT being isolated from the data line, and a drain electrode of the backup TFT being isolated from the pixel electrode;
• a first repair line, one end of the first repair line and the source electrode of the backup TFT being isolated from each other and there being an overlapping region between one end of the first repair line and the source electrode of the backup TFT, and the other end of the first repair line and the data line or a source electrode of the TFT being isolated from each other and there being an overlapping region between the other end of the first repair line and the data line or a source electrode of the TFT;
• and
• a second repair line, one end of the second repair line and the drain electrode of the backup TFT being isolated from each other and there being an overlapping region between one end of the second repair line and the drain electrode of the backup TFT, and the other end of the second repair line and the pixel electrode or a drain electrode of the TFT being isolated from each other and there being an overlapping region between the other end of the second repair line and the pixel electrode or a drain electrode of the TFT.