Flat display, touch device and touch detecting method

A flat display with touch function, comprising:

• a plurality of scan lines;
• a plurality of data lines intersecting with the scan lines to divide the flat display into a plurality of pixel regions;
• a plurality of pixel transistors disposed in the pixel regions respectively, and each of the pixel transistors being electrically coupled to a corresponding one of the scan lines and a corresponding one of the data lines;
• a plurality of pixel electrodes disposed in the pixel regions respectively, each of the pixel electrodes being electrically coupled to a corresponding one of the pixel transistors;
• a plurality of readout lines intersecting with the scan lines;
• and
• a plurality of sensors electrically coupled to the corresponding scan lines and the corresponding readout lines respectively;
• wherein a scan signal is introduced into the scan lines in sequence to control whether turning on the sensors, the scan signal comprises at least one first turn-on pulse and a second turn-on pulse to simultaneously turn on at least two of the sensors, and the at least two of the sensors which are turned on simultaneously are electrically coupled to different scan lines.