Touch display device, back light unit and flexible printed circuit

A back light unit comprising:

• a light source;
• a light guide plate configured to uniformly transfer a light incident from the light source to a display panel;
• a guide panel having a rectangular frame shape and configured to accommodate the light source and the light guide plate therein;
• and
• a flexible printed circuit including a first part disposed under the light source and the light guide plate and a second part extended from the first part to be disposed in a partial area under the display panel while covering a lateral surface of the guide panel.

A flexible printed circuit comprising:

• an electrode unit;
• a main circuit unit located on a side of the electrode unit;
• a connection unit folded in a direction while connecting the electrode unit and the main circuit unit;
• and
• a signal input unit connected to the other side of the electrode unit or to the main circuit unit.