Display device with touch panel having X, Y and dummy electrodes

摘要

A display device includes a display panel, and an electrostatic capacitive type touch panel which is formed in an overlapping manner with the display panel. A plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes. A first signal line supplies signals to the X electrodes, a second signal line supplies signals to the Y electrodes, and the first signal line and the second signal line are formed on a flexible printed circuit board. A dummy electrode is formed adjacent to an electrode portion of each X electrode and electrode portion of each Y electrode, the dummy electrode does not overlap the X electrode and the Y electrode, and the dummy electrode does not electrically connect with the first and second signal lines.

主权项

1. A display device comprising:
a display panel; an electrostatic capacitive type touch panel which is formed in an overlapping manner with the display panel, the electrostatic capacitive type touch panel having a substantially rectangular shape with a pair of long sides and a pair of short sides; a plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes which are formed on the electrostatic capacitive type touch panel, each X electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and the electrode portions each of which is formed between two intersecting portions, and each Y electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and electrode portions each of which is formed between two intersecting portions; a first signal line having a first portion which extends along at least one of the short and long sides of the electrostatic capacitive type touch panel and having at least one connection terminal at one of the short sides, the first signal line supplying signals to the X electrodes; a second signal line having a first portion which extends along at least one of the short and long sides of the electrostatic capacitive type touch panel and having at least one connection terminal at the one of the short sides, the second signal line supplying signals to the Y electrodes; and a flexible printed circuit board on which a second portion of the first signal line and a second portion of the second signal line are formed; wherein a dummy electrode is formed adjacent to the electrode portion of said each X electrode; wherein the dummy electrode does not overlap the X electrode and the Y electrode; and wherein the dummy electrode does not electrically connect with the first and second signal lines; wherein the electrode portions of the X electrode are decreased in size with respect to a size of the electrode portions of the Y electrode so as to be smaller in area than an area of the electrode portions of the Y electrodes; wherein the dummy electrode is formed in a space that is formed by the decreased size of the electrode portion of the X electrode; wherein the flexible printed circuit board is disposed above an upper surface of the one of the short sides of the electrostatic capacitive type touch panel where the connection terminals are arranged; and wherein the second portions of the first and second signal lines on the flexible printed circuit board are connected with the connection terminals of the first portions of the first and second signal lines at the one of the short sides of the electrostatic capacitive touch panel.