OLED ARRAY SUBSTRATE AND MANUFACTURING METHOD THEREOF, ARRAY SUBSTRATE AND DISPLAY DEVICE

• US 20180261663A1
• Filed: 05/25/2017
• Published: 09/13/2018
• Est. Priority Date: 05/30/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: LI, Yongqian, XU, Pan, LI, Quanhu
• Granted Patent: US 10,453,909 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2320/0295 by monitoring each display pixel
• CPC Class Codes: G09G 2320/0693 Calibration of display systems
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H01L 21/77 Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate electrically programmable read-only memories or multistep manufacturing processes therefor H10B69/00
• CPC Class Codes: H01L 27/1244 for preventing breakage, peeling or short circuiting
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/82 Cathodes
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/1216 the pixel elements being capacitors
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

An OLED array substrate and a manufacturing method thereof, an array substrate and a display device are provided. The OLED array substrate includes a wire; a plurality of pixel units, each of which includes an OLED light-emitting unit, a driving transistor and a storage capacitor; an insulation layer which covers the driving transistor, the storage capacitor and the wire; and a conductive layer, which is on the insulation layer and is configured to provide a common voltage to the plurality of the pixel units. At least one of the wire, the driving transistor and the storage capacitor is overlapped with the conductive layer in a direction perpendicular to the OLED array substrate.

Claims

1. An OLED array substrate, comprising:

a plurality of pixel units, wherein each of the plurality of pixel units comprises an OLED light-emitting unit, a driving transistor and a storage capacitor;

a wire;

an insulation layer which covers the driving transistor, the storage capacitor and the wire; and

a conductive layer, which is on the insulation layer and is configured to provide a common voltage to the plurality of the pixel units;

wherein at least one of the wire, the driving transistor and the storage capacitor is overlapped with the conductive layer in a direction perpendicular to the OLED array substrate.

2. The OLED array substrate according to claim 1, wherein the wire comprises a detection and compensation line which is configured to connect the plurality of pixel units and a detection integrated circuit;

and the conductive layer comprises a first common power supply line which is overlapped with the detection and compensation line in the direction perpendicular to the OLED array substrate.

3. The OLED array substrate according to claim 1, wherein the wire comprises a gate line, and the conductive layer comprises a second common power supply line which is parallel with the gate line and is overlapped with the gate line in the direction perpendicular to the OLED array substrate.

4. The OLED array substrate according to claim 3, wherein the second common power supply line is further overlapped with an area that the driving transistor is located and an area that the storage capacitor is located in the direction perpendicular to the OLED array substrate.

5. The OLED array substrate according to claim 1, wherein the wire comprises a data line;

and

the conductive line comprises a third common power supply line which is overlapped with the data line in the direction perpendicular to the OLED array substrate.

6. The OLED array substrate according to claim 1, wherein the wire comprises a data line;

the OLED array substrate further comprises a data line reserved pattern; and

the conductive layer is connected to a source electrode of the driving transistor and the data line reserved pattern respectively through a first via hole and a second via hole which run through the insulation layer.

7. The OLED array substrate according to claim 6, further comprising a base substrate, wherein the OLED light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode which are away from the base substrate in sequence;

the OLED array substrate further comprises an insulation interlayer covering the conductive layer and the insulation layer in a case where the conductive layer comprises a third common power supply line; and

the first electrode is disposed on the insulation interlayer.

8. The OLED array substrate according to claim 1, wherein each of the plurality of pixel units further comprises a first transistor and a second transistor, and the OLED array substrate comprises a plurality of wires comprising a data line, a gate line and a detection and compensation line;

a source electrode of the first transistor is electrically connected with the data line, a drain electrode of the first transistor is electrically connected with a gate electrode of the driving transistor, and a gate electrode of the first transistor is electrically connected with gate line;

a source electrode of the driving transistor is electrically connected with the conductive layer, a drain electrode of the first transistor is electrically connected with an anode of the OLED light-emitting unit and a source electrode of the second transistor;

one end of the storage capacitor is electrically connected with the drain electrode of the first transistor, and the other end of the storage capacitor is electrically connected with a drain electrode of the driving transistor;

a cathode of the OLED light-emitting unit is grounded; and

a gate electrode of the second transistor is electrically connected with the detection and compensation line.

9. The OLED array substrate according to claim 1, wherein the wire is a metal wire and/or the conductive layer is a metal conductive layer.

10. The OLED array substrate according to claim 1, wherein the OLED array substrate comprises a display area and a surrounding area located in a periphery of the display area;

the display area comprises a plurality of light-emitting areas corresponding to a plurality of OLED light-emitting units of the plurality of pixel units and a non-light-emitting area located in an area other than the plurality of light-emitting areas; and

a portion of the conductive layer is at least partially located outside the plurality of light-emitting areas, which portion of the conductive layer is overlapped with at least one of the wire, the driving transistor and the storage capacitor.

17. A display device, comprising the OLEO array substrate according to claim 1.

19. The OLED array substrate according to claim 2, wherein the wire comprises a gate line, and

the conductive layer comprises a second common power supply line which is parallel with the gate line and is overlapped with the gate line in the direction perpendicular to the OLED array substrate.

20. The OLED array substrate according to claim 2, wherein the wire comprises a data line;

and

the conductive line comprises a third common power supply line which is overlapped with the data line in the direction perpendicular to the OLED array substrate.

11. A manufacturing method of an OLED array substrate, comprising:

forming a wire;

forming a pixel unit, wherein the pixel unit comprises an OLED light-emitting unit, a driving transistor and a storage capacitor;

forming an insulation layer which covers the pixel unit and the wire; and

forming a conductive layer which is on the insulation layer and is overlapped with at least one of the wire, wherein the driving transistor and the storage capacitor is overlapped with the conductive layer in a direction perpendicular to the OLED array substrate, and the conductive layer is configured to provide a common voltage to the pixel unit.

12. The manufacturing method according to claim 11, wherein the wire formed comprises a data line;

a data line reserved pattern is formed in a same layer as the data line;

the insulation layer is formed to cover the driving transistor, the storage capacitor and the wire;

the conductive layer is connected with a source electrode of the driving transistor and the data line reserved pattern through a first via hole and a second via hole respectively, and the first via hole and the second via hole run through the insulation layer;

a third via hole which exposes a drain electrode of the driving transistor is formed in the insulation layer;

a first electrode and the conductive layer are formed on the insulation layer and the first electrode is connected with the drain electrode of the driving transistor through the third via hole;

a pixel-defining layer is formed which covers the first electrode and the conductive layer;

a light-emitting layer is formed in an opening of the pixel-defining layer; and

a second electrode is formed on the light-emitting layer;

wherein the OLED light-emitting unit comprises the first electrode, the light-emitting layer and the second electrode.

13. The manufacturing method according to claim 12, wherein forming the first electrode and the conductive layer on the insulation layer comprises:

forming the conductive layer on the insulation layer, wherein the conductive layer formed comprises a third common power supply line parallel with the data line, and the third common power supply line is overlapped with the data line in the direction perpendicular to the OLED array substrate;

forming the insulation interlayer covering the conductive layer and a fourth via hole which is communicated with the third via hole in the insulation interlayer; and

forming the first electrode on the insulation interlayer, wherein the first electrode is connected with the drain electrode of the driving transistor through the third via hole and the fourth via hole.

14. The manufacturing method according to claim 11, wherein the wire is a metal wire and/or the conductive layer is a metal conductive layer.

15. An array substrate, comprising:

a plurality of pixel units, wherein each of the plurality of pixel units comprises a light-emitting unit, and a driving transistor and a storage capacitor which are connected with the light-emitting unit;

a wire, which is connected with the plurality of pixel units;

an insulation layer, which covers the driving transistor, the storage capacitor and the wire; and

a conductive layer, which is on the insulation layer and is configured to provide a common voltage for the pixel unit;

wherein the conductive layer comprises a portion which is overlapped with at least one of the wire, the driving transistor and the storage capacitor in a direction perpendicular to the array substrate.

16. The array substrate according to claim 15, comprising a display area and a surrounding area located in a periphery of the display area,

wherein the display area comprises a plurality of light-emitting areas corresponding to a plurality of light-emitting units of the plurality of pixel units and a non-light-emitting area located in an area other than the plurality of light-emitting areas, and the portion of the conductive layer is located outside the non-light-emitting area.

18. A display device, comprising the OLED array substrate according to claim 15.