Display device with touch panel having X, Y and dummy electrodes
AssigneesJapan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
InventorShinya Hashimoto
Life of this patent
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Abstract
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.
Claims6
A display device comprising:
- a display panel having an organic light emitting diode element;
- a touch panel having a plurality of X electrodes arranged along a X direction and a plurality of Y electrodes arranged along a Y direction;
- a flexible printed circuit board connecting the touch panel, the flexible printed circuit board having a plurality of first signal lines electrically connecting the plurality of X electrodes and a plurality of second signal lines electrically connecting the plurality of electrodes;
- wherein
- the flexible printed circuit board has a first conductive layer and a second conductive layer,
- a first portion of the first signal line is made of the first conductive layer and extending along the Y direction,
- a second portion of the second signal line is made of the second conductive layer and extending along the X direction,
- the touch panel has a floating electrode which is between one of the plurality of X electrodes and one of the plurality of Y electrodes, and does not connect the plurality of X electrodes and the plurality of Y electrodes,
- the touch panel is disposed on the display panel, and
- a polarizer is arranged on the touch panel.
Dependencies are inferred from the claim text.