Organic light emitting diode, touch display device and method for fabricating the same

• US 9,117,679 B2
• Filed: 08/27/2013
• Issued: 08/25/2015
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Ma, Zhanjie
• Primary Examiner(s): HOANG, QUOC DINH
• Application Number:
  US14/010,916
• Publication Number:
  US 20140091286A1
• Time in Patent Office: 728 Days
• Field of Search: 257/40, 257/59, 257/72
• US Class Current: 1/1
• CPC Class Codes: H01L 29/04 characterised by their crystalline structure, e.g. polycrystalline, cubic or particular orientation of crystalline planes characterised by physical imperfections H01L29/30
• CPC Class Codes: H03K 17/962 Capacitive touch switches
• CPC Class Codes: H03K 2217/960795 using organic light emitting devices, e.g. light emitting polymer [OEP] or OLED
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 59/1216 the pixel elements being capacitors
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

The invention provides an OLED, a touch display device and method for fabricating the same. The OLED comprises: a substrate; a pixel electrode functioning as a first conducting electrode on the substrate; a first signal electrode and a second signal electrode disposed on the same layer as the pixel electrode; an insulating layer overlaying the first signal electrode and the second signal electrode; an EL layer in the same layer as the insulating layer and overlaying the pixel electrode; a second conducting electrode overlaying at least the EL layer; and an encapsulating layer overlaying at least the second conducting electrode.

Claims

1. An organic light emitting diode, comprising:

a substrate;

a pixel electrode functioning as a first conducting electrode on the substrate;

a first signal electrode and a second signal electrode disposed on the same layer as the pixel electrode, wherein the first signal electrode is connected to a first sensing line, the second signal electrode is electrically connected to a second sensing line, and the first sensing line and the second sensing line intersect with each other but are not electrically connected with each other;

an insulating layer overlaying the first signal electrode and the second signal electrode,

an EL layer overlaying the pixel electrode, a laminated layer of the EL layer and the pixel electrode is in the same layer as the insulating layer;

a second conducting electrode overlaying at least the EL layer; and

an encapsulating layer overlaying at least the second conducting electrode.

2. The organic light emitting diode of claim 1, wherein the first conducting electrode is an anode of the organic light emitting diode, and the second conducting electrode is a cathode of the organic light emitting diode.

3. The organic light emitting diode of claim 2, further comprising a hole transmission layer disposed between the anode and the EL layer.

4. The organic light emitting diode of claim 3, wherein a portion of the second conducting electrode located directly above the first signal electrode and the second signal electrode is removed.

5. The organic light emitting diode of claim 2, further comprising an electron transmission layer disposed between the cathode and the EL layer.

6. The organic light emitting diode of claim 5, wherein a portion of the second conducting electrode located directly above the first signal electrode and the second signal electrode is removed.

7. The organic light emitting diode of claim 2, wherein a portion of the second conducting electrode located directly above the first signal electrode and the second signal electrode is removed.

8. The organic light emitting diode of claim 1, wherein the insulating layer is an organic insulating layer.

9. The organic light emitting diode of claim 8, wherein a portion of the second conducting electrode located directly above the first signal electrode and the second signal electrode is removed.

10. The organic light emitting diode of claim 1, wherein a portion of the second conducting electrode located directly above the first signal electrode and the second signal electrode is removed.

11. A touch display device comprising:

a plurality of display elements arranged in an array, wherein each of the display elements comprises a pixel element surrounded by a gate line and a data line, wherein the pixel elements in at least a part of the display elements comprise the OLED of claim 1;

the touch display device further comprising;

a plurality of first sensing lines arranged parallel to each other and a plurality of second sensing lines arranged parallel to each other, wherein the first sensing lines and the second sensing lines intersect with each other but are not electrically connected with each other, the first signal electrode of the OLED is electrically connected to the first sensing lines, and the second signal electrode of the OLED is electrically connected to the second sensing lines.

12. The touch display device of claim 11, wherein the first sensing lines are in the same layer as the data line, the second sensing lines are in the same layer as the gate line.

13. The touch display device of claim 11, wherein the first sensing lines are in the same layer as the gate line, the second sensing lines are in the same layer as the data line.