Display device having a plurality of pad terminals including connection pad terminals and dummy pad terminals

Abstract

A display device includes a substrate including a display area to display an image and a pad area positioned around the display area; a first pad unit disposed on the pad area, and including a first terminal region having a plurality of first pad terminals arranged in a first direction; and a printed circuit board including a base film and a second pad unit positioned at one side of the base film, the second pad unit being coupled with the first pad unit by electrically connecting with the plurality of first pad terminals. Each of the plurality of first pad terminals includes: at least three first connection pad terminals arranged in a first row disposed at a first angle larger than 0° and smaller than 90° relative to the first direction, the plurality of first connection pad terminals being in electrically connecting with the second pad unit of the printed circuit board through a plurality of conductive balls; a plurality of second connection pad terminals spaced apart from the plurality of first connection pad terminals, and arranged in a second row disposed at a second angle larger than 0° and smaller than 90° relative to the first direction, the plurality of second connection pad terminals being in electrically connecting with the second pad unit of the printed circuit board through another plurality of conductive balls; and a plurality of first dummy pad terminals disposed between pairs of adjacent first connection pad terminals of the first connection pad terminals.