Woled display device and manufacture method thereof

Patent metadata

Field	Value
Publication number	US-2016343779-A1
Application number	US-201514429356-A
Country	US
Kind code	A1
Filing date	Feb 9, 2015
Priority date	Dec 18, 2014
Publication date	Nov 24, 2016
Grant date	—

Abstract

The present invention provides a WOLED display device and a manufacture method thereof. By locating a thickness of a part of the insulative layers correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the insulative layers in the white sub pixel area to increase a vertical distance from the first electrode to the bottom layer wiring in the white sub pixel area, and meanwhile, by locating the first electrode and the bottom layer wiring in the white sub pixel area to be spaced with a distance in the horizontal direction to make a larger space between the first electrode and the bottom layer wiring, and thus, the bad phenomenon of the short circuit, the overcurrent caused by impurity substance between the first electrode and the bottom layer wiring can be avoided. The manufacture method of the WOLED display device is simple, easy for operation, and can prevent the short circuit or the overcurrent between the first electrode and the bottom layer wiring in the white sub pixel area occur and raise the manufacture yield of the WOLED display device.

First claim

What is claimed is:

1 . A WOLED display device, comprising a red sub pixel area, a green sub pixel area, a blue sub pixel area and a white sub pixel area;
wherein the white sub pixel area comprises: a first substrate, a bottom layer wiring and a thin film transistor located on the first substrate, a second insulative layer located on the bottom layer wiring, the thin film transistor and the first substrate, a third insulative layer located on the second insulative layer, a first electrode located on the third insulative layer, an organic layer located on the first electrode, a second electrode located on the organic layer and a second substrate located on the second electrode; a thickness of a part of the insulative layers correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the insulative layers in the white sub pixel area.

2 . The WOLED display device according to claim 1 , wherein a thickness of a part of the third insulative layer correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the third insulative layer in the white sub pixel area.

3 . The WOLED display device according to claim 2 , wherein the first electrode and the bottom layer wiring are spaced with a distance in the horizontal direction.

4 . The WOLED display device according to claim 1 , wherein a thickness of a part of the second insulative layer correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the second insulative layer in the white sub pixel area.

5 . The WOLED display device according to claim 1 , wherein the first substrate is a transparent substrate; the first electrode is an anode, which is a transparent electrode; the second electrode is a cathode, which is a reflective electrode.

6 . A manufacture method of a WOLED display device, comprising steps of:
step 1, providing a first substrate, and manufacturing a thin film transistor and a bottom layer wiring on the first substrate, and forming a second insulative layer on the bottom layer wiring, the thin film transistor and the first substrate; step 2, locating a red light filter on the second insulative layer in a red sub pixel area, and locating a green light filter on the second insulative layer in a green sub pixel area, and locating a blue light filter on the second insulative layer in a blue sub pixel area; then, forming a third insulative layer on the second insulative layer and the red light, the green light and the blue light filters; step 3, sequentially forming a first electrode and an organic layer on the third insulative layers in the red sub pixel area, the green sub pixel area, the blue sub pixel area and the white sub pixel area, and meanwhile, forming a spacer layer on the third insulative layer between every two adjacent sub pixel areas; then, forming a second electrode on the organic layer and the spacer layer, and locating a second substrate on the second electrode.

7 . The manufacture method of the WOLED display device according to claim 6 , wherein in the step 1, a thickness of a part of the second insulative layer correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the second insulative layer in the white sub pixel area.

8 . The manufacture method of the WOLED display device according to claim 6 , wherein in the step 2, a thickness of a part of the third insulative layer correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the third insulative layer in the white sub pixel area.

9 . The manufacture method of the WOLED display device according to claim 8 , wherein the first electrode and the bottom layer wiring are spaced with a distance in the horizontal direction.

10 . The manufacture method of the WOLED display device according to claim 6 , wherein the first substrate is a transparent substrate; the first electrode is an anode, which is a transparent electrode; the second electrode is a cathode, which is a reflective electrode.

11 . A WOLED display device, comprising a red sub pixel area, a green sub pixel area, a blue sub pixel area and a white sub pixel area;
wherein the white sub pixel area comprises: a first substrate, a bottom layer wiring and a thin film transistor located on the first substrate, a second insulative layer located on the bottom layer wiring, the thin film transistor and the first substrate, a third insulative layer located on the second insulative layer, a first electrode located on the third insulative layer, an organic layer located on the first electrode, a second electrode located on the organic layer and a second substrate located on the second electrode; a thickness of a part of the insulative layers correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the insulative layers in the white sub pixel area; wherein a thickness of a part of the third insulative layer correspondingly positioned above the bottom layer wiring in the white sub pixel area is larger than a thickness of other part of the third insulative layer in the white sub pixel area; wherein the first substrate is a transparent substrate; the first electrode is an anode, which is a transparent electrode; the second electrode is a cathode, which is a reflective electrode.

12 . The WOLED display device according to claim 11 , wherein the first electrode and the bottom layer wiring are spaced with a distance in the horizontal direction.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Zhang Hejing
• Liu Yawei

Classifications

• H10K59/351

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title

• H10D86/443 Primary

  adapted for preventing breakage, peeling or short circuiting · CPC title

• H10D86/451

  characterised by the compositions or shapes of the interlayer dielectrics · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title