Patent ID: 7965367

Claim:
A display device comprising: a display panel having at least a first substrate; and a flexible printed circuit board which is mechanically and electrically connected with an edge portion of at least one side of the first substrate, wherein the flexible printed circuit board has a group of differential signal lines including a plurality of pairs of differential signal lines which transmits differential signals, the flexible printed circuit board includes a first portion having first connection terminals which are electrically and mechanically connected with electrodes formed on the first substrate, and a second portion contiguously formed with the first portion and having second connection terminals which are connected with an external connector, a pair of GND lines is arranged on both sides of a positive signal line and a negative signal line of each pair of differential signal lines in the first portion and the second portion, and an additional GND line is arranged at least between the positive signal line and the negative signal line of each pair of the differential signal lines in the second portion.