Organic light emitting display device
An organic light emitting display device capable of having an electrostatic capacitive type touch panel function without substantially increasing the thickness of the display device and/or including a touch panel with an improved interface between a touch panel module of the touch panel and a touch panel drive integrated circuit (IC) of the touch panel.
1. An organic light emitting display device comprising:
a substrate;
a display unit on the substrate;
an encapsulation substrate having a first side facing the display unit, and a second side facing away from the display unit;
a touch unit on the second side of the encapsulation substrate and comprising:
a first pattern layer contacting the encapsulation substrate and comprising a plurality of first sensors, the plurality of first sensors being electrically coupled to each other and extending in parallel rows along a first direction;
a first insulating layer on at least a portion of the first pattern layer;
a second pattern layer on at least a portion of the first insulating layer and comprising a plurality of second sensors, the plurality of second sensors being electrically coupled to each other and extending in parallel columns along a second direction crossing the first direction; and
a second insulating layer on at least a portion of the second pattern layer,
wherein the first pattern layer, the first insulating layer, the second pattern layer, and the second insulating layer are sequentially formed on the second side of the encapsulation substrate.
2. The organic light emitting display device of claim 1 , wherein
each of the plurality of first sensors comprises a first diamond-shaped pad, and
each of the plurality of second sensors comprises a second diamond-shaped pad at a position adjacent to one of the first diamond-shaped pads.
3. The organic light emitting display device of claim 1 , wherein
a plurality of first connecting units are configured to electrically couple the plurality of first sensors that are adjacent to each other on the first pattern layer; and
a plurality of second connecting units are configured to electrically couple the second sensors that are adjacent to each other on the second pattern layer.
4. The organic light emitting display device of claim 1 , wherein the display unit comprises:
a thin film transistor (TFT) on the substrate; and
an organic light emitting diode (OLED) electrically coupled to the TFT,
wherein the OLED comprises a counter electrode, a pixel electrode, and an intermediate layer between the counter electrode and the pixel electrode, and
wherein the counter electrode and the first pattern layer are configured to form a first capacitor.
5. The organic light emitting display device of claim 4 , wherein
the first pattern layer is further configured to form a second capacitor with an object approaching the encapsulation substrate, and
the first capacitor is electrically coupled in series with the second capacitor.
6. The organic light emitting display device of claim 1 , further comprising a flexible printed circuit board (PCB) electrically coupled to the plurality of first sensors and the plurality of second sensors,
wherein the flexible PCB comprises a circuit for driving and controlling the touch unit.
7. The organic light emitting display device of claim 6 , further comprising a connector for delivering an electrical signal generated by the touch unit to the flexible PCB,
wherein the connector is electrically coupled to the plurality of first sensors and the plurality of second sensors.
8. The organic light emitting display device of claim 1 , wherein the first insulating layer entirely covers an upper surface of the first pattern layer.