Single-layer capacitive touch unit and capacitive touch screen

A capacitive touch screen, which comprises:

• a pixel array substrate, a touch screen substrate disposed oppositely to the pixel array substrate, and a liquid crystal layer disposed between the pixel array substrate and the touch screen substrate;
• wherein the touch screen substrate further comprising a touch structure layer, and the touch structure layer comprising a plurality of capacitive touch units;
• the capacitive touch unit further comprising:
• a sensing electrode, connected to a control unit through a sensing electrode lead;
• and a plurality of scan electrodes, disposed at two sides of the sensing electrode;
• each of the scan electrodes being connected to the control unit through a scan electrode lead, and the scan electrodes and the sensing electrode being coplanar;
• wherein one end of a selected one of the scan electrode leads is connected to a second end of a selected one of the scan electrodes and extends to near a next scan electrode, which is one of the scan electrodes other than the selected scan electrode, to form an extending lead;
• and the other end of the selected scan electrode lead is connected to the control unit.