Venetian blind capable of performing automatic alignment for slats

A venetian blind comprising:

• a headrail;
• a bottom rail located below the headrail;
• a plurality of slats provided between the headrail and the bottom rail, each of the slats having a top surface, a bottom surface, a first edge connected with the top and bottom surfaces, a second edge connected with the top and bottom surfaces and opposite to the first edge, a perforation passing through the top and bottom surfaces, and a recess provided at one of the first and second edges;
• two ladder cords provided between the headrail and the bottom rail, each of the ladder cords having a first warp adjacent to the first edges of the slats, a second warp adjacent to the second edges of the slats, a plurality of wefts connected with the first and second warps and supporting the bottom surfaces of the slats, and a plurality of first loops connected with the first warp and penetrated in the perforations of the slats;
• and
• a lifting unit having a first pull cord adjacent to the first wrap and a second pull cord adjacent to the second wrap;
• wherein at least one of the first pull cord, the second pull cord, the first warp, and the second warp is positioned in the recesses of the slats.