OLED device and manufacturing method thereof, and flexible display unit

• US 10,319,933 B2
• Filed: 04/08/2016
• Issued: 06/11/2019
• Est. Priority Date: 03/23/2016
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Liu, Zhe
• Primary Examiner(s): Maruf, Sheikh
• Application Number:
  US15/100,345
• Publication Number:
  US 20180123079A1
• Time in Patent Office: 1,159 Days
• Field of Search: 257 40, 438 99
• CPC Class Codes: H10K 2102/00 Constructional details relating to the organic devices covered by this subclass
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/813 characterised by their shape
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/611 using printing deposition, e.g. ink jet printing
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

The invention discloses an OLED device including: a flexible substrate; a first anode and a second anode on the flexible substrate and being spaced from each other to form a channel therebetween; a flexible electrically-conductive assembly in the channel and connecting the first anode with the second anode; a first organic light emitting layer on the first anode and a second organic light emitting layer on the second anode; and a cathode on the first and the second organic light emitting layers. The invention can improve the flexibility of the anode of the OLED device, reduce an actual continuous length of the anode on a bending direction, reduce the probability of crack generation in the process of the OLED device being bent by external force, and therefore can increase bendable and wearable abilities of a flexible OLED display device formed by such OLED device.

Claims

1. An organic light emitting diode (OLED) device comprising:

a flexible substrate;

a first anode and a second anode on the flexible substrate, wherein the first anode and the second anode are spaced from each other to form a channel therebetween;

a flexible electrically-conductive assembly in the channel, wherein the flexible electrically-conductive assembly electrically connects the first anode with the second anode so that the first anode and the second anode are electrically connected to each other;

a first organic light emitting layer on the first anode and a second organic light emitting layer on the second anode;

a planarization insulating layer on the flexible electrically-conductive assembly; and

a cathode on the first organic light emitting layer, the second organic light emitting layer and the planarization insulating layer;

wherein the first anode, the flexible electrically-conductive assembly, and the second anode are provided on a common plane defined by a surface of the flexible substrate and the first anode and the second anode are electrically connected to each other with the flexible electrically-conductive assembly such that the first organic light emitting layer and the second organic light emitting layer are connected in parallel to each other and are energizable simultaneously through the first and second anodes being electrically connected to each other with the flexible electrically-conductive assembly.

2. The OLED device according to claim 1, wherein the flexible electrically-conductive assembly comprises a plurality of electrically-conductive nanowires, the plurality of electrically-conductive nanowires arranged in an array in the channel, and each of the plurality of electrically-conductive nanowires connects the first anode with the second anode.

3. The OLED device according to claim 2, wherein the plurality of electrically-conductive nanowires are made of silver or a metallic carbon nanotube.

4. A flexible display unit comprising:

a flexible substrate;

a buffer layer on the flexible substrate;

a switching element on the buffer layer, wherein the switching element at least comprises a control electrode an input electrode and an output electrode;

a first planarization layer on the buffer layer and covering the switching element;

a first anode and a second anode on the first planarization layer, wherein the first anode and the second anode are spaced from each other to form a channel therebetween, the first anode penetrates through the first planarization layer to connect the output electrode of the switching element;

a flexible electrically-conductive assembly in the channel, wherein the flexible electrically-conductive assembly connects the first anode with the second anode so that the first anode and the second anode are electrically connected to each other;

a second planarization layer covering the first anode, the second anode, and the flexible electrically-conductive assembly;

a first organic light emitting layer and a second organic light emitting layer in the second planarization layer, wherein the first organic light emitting layer is in contact with the first anode, and the second organic light emitting layer is in contact with the second anode; and

a cathode on the second planarization layer and being in contact with both the first organic light emitting layer and the second organic light emitting layer;

wherein the first anode, the flexible electrically-conductive assembly, and the second anode are provided on a common plane defined by a surface of the flexible substrate and the first anode and the second anode are electrically connected to each other with the flexible electrically-conductive assembly such that the first organic light emitting layer and the second organic light emitting layer are connected in parallel to each other and are energizable simultaneously through the first and second anodes being electrically connected to each other with the flexible electrically-conductive assembly.

5. The flexible display unit according to claim 4, wherein the flexible electrically-conductive assembly comprises a plurality of electrically-conductive nanowires, the plurality of electrically-conductive nanowires are arranged in an array in the channel, and each of the plurality of electrically-conductive nanowires connects the first anode with the second anode.

6. The flexible display unit according to claim 5, wherein each of the plurality of electrically-conductive nanowires is made of sliver or a metallic carbon nanotube.