OLED display device with embedded touch electrode
View Patent ↗A touch display device includes substrate; TFT layer positioned on substrate, and the TFT layer comprising TFT; anode positioned on TFT layer and contacting with source or drain of the TFT; first touch electrode structure positioned on TFT and insulating with the anode; first planar layer positioned on first touch electrode structure, TFT and anode, the first planar layer has a first hole for exposing the anode; second touch electrode structure positioned on first planar layer; OLED element positioned on anode; cathode positioned on first planar layer and insulating with second touch electrode structure, cathode is filled first hole for connecting with the OLED element; and packaging layer positioned on cathode and first planar layer. The invention is embedded the touch electrode structure in the OLED display device, achieves highly touch accuracy and sensitivity In-cell touch OLED display device.
1. A touch display device, comprising
a substrate;
a TFT layer positioned on the substrate, and the TFT layer comprising a TFT;
an anode positioned on the TFT layer and contacting with a source or a drain of the TFT;
a first touch electrode structure positioned on the TFT and insulating with the anode;
a first planar layer positioned on the first touch electrode structure, the TFT and the anode, the first planar layer has a first hole for exposing the anode;
a second touch electrode structure positioned on the first planar layer;
an OLED element positioned on the anode;
a cathode positioned on the first planar layer and insulating with the second touch electrode structure, the cathode is filled the first hole for connecting with the OLED element; and
a packaging layer positioned on the cathode and the first planar layer;
wherein the touch display device further comprises an insulating protecting layer positioned between the first planar layer and the cathode, and covering on top of the second touch electrode structure directly.
2. The touch display device according to claim 1 , wherein the first touch electrode structure comprising a plurality of first sensing strip, the first sensing strips are parallel to each other and separately positioned, and each of the first sensing strips is extending along a first direction, each of the first sensing strips comprises a plurality of cascade first sensing pad and a plurality of first bridge connector.
3. The touch display device according to claim 2 , wherein the second touch electrode structure comprising a plurality of second sensing strip, the second sensing strips are parallel to each other and separately positioned, and each of the second sensing strips is extending along a second direction which is perpendicular to the first direction, each of the second sensing strips comprises a plurality of cascade second sensing pad and a plurality of second bridge connector.
4. The touch display device according to claim 3 , wherein shape of the first sensing pad and/or the second sensing pad is one of rectangular, grid, rhombus, triangle, regular pentagon, regular hexagon, octagon.
5. The touch display device according to claim 3 , wherein the touch display device further comprising a plurality of binding pad and a plurality of wire, each of the first sensing strips correspondingly connecting to one of the binding pad according to one of the correspondingly wire, each of the second sensing strips correspondingly connecting to one of the binding pad according to one of the correspondingly wire.