OLED DISPLAY PANEL AND FABRICATION METHOD THEREOF, AND DISPLAY DEVICE

• US 20160300888A1
• Filed: 09/26/2014
• Published: 10/13/2016
• Est. Priority Date: 05/09/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: WANG, Chun Jan, WU, Chang Yen
• Granted Patent: US 9,704,930 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• 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 display panel and a fabrication method thereof, and a display device are disclosed. The OLED display panel comprises: an array substrate and a package cover plate disposed opposite to each other, and an OLED layer which is formed on a surface of the array substrate facing the package cover plate and comprises a plurality of OLEDs. The OLED display panel further comprises: a first thin film packaging layer, covering the OLED layer and bonded to the array substrate; a color filter layer, provided on a side of the first thin film packaging layer facing the package cover plate; and a bonding adhesive, filled between the array substrate and the package cover plate to bond the array substrate and the package cover plate, the bonding adhesive covering the color filter layer and the first thin film packaging layer.

Claims

1. An OLED display panel, comprising:

an array substrate and a package cover plate disposed opposite to each other, and an OLED layer which is formed on a surface of the array substrate facing the package cover plate and comprises a plurality of OLEDs,

wherein the OLED display panel further comprises;

a first thin film packaging layer, covering the OLED layer and bonded to the array substrate;

a color filter layer, provided on a side of the first thin film packaging layer facing the package cover plate; and

a bonding adhesive, filled between the array substrate and the package cover plate to bond the array substrate and the package cover plate, the bonding adhesive covering the color filter layer and the first thin film packaging layer.

2. The OLED display panel according to claim 1, further comprising:

a second thin film packaging layer which is provided between the bonding adhesive and the color filter layer.

3. The OLED display panel according to claim 1, wherein the color filter layer comprises a plurality of monochromatic color filter units corresponding to sub-pixel units of the display panel one by one.

4. The OLED display panel according to claim 3, wherein

the OLED layer is a WOLED layer comprising a plurality of white organic light emitting diodes (WOLEDs);

and

any two adjacent monochromatic color filter units in the color filter layer are different in color.

5. The OLED display panel according to claim 4, wherein

the plurality of monochromatic color filter units in the color filter layer comprises a red color filter unit R, a green color filter unit G, a white color filter unit W and a blue color filter unit B;

and

surfaces of the plurality of monochromatic color filter units in the color filter layer away from the array substrate are provided in a same plane.

6. The OLED display panel according to claim 5, wherein

one red color filter unit R, one green color filter unit G, one white color filter unit W and one blue color filter unit B form a pixel unit;

in a same pixel unit, any two adjacent monochromatic color filter units are in contact with each other or a black matrix is disposed between any two adjacent monochromatic color filter units.

7. The OLED display panel according to claim 4, wherein

the plurality of monochromatic color filter units in the color filter layer comprises a red color filter unit R, a green color filter unit G and a blue color filter unit B;

one red color filter unit R, one green color filter unit G and one blue color filter unit B form a pixel unit; and

any two adjacent monochromatic color filter units in a same pixel unit are in contact with each other and are partially overlapped with each other.

8. The OLED display panel according to claim 4, wherein

the plurality of monochromatic color filter units in the color filter layer comprises a red color filter unit R, a green color filter unit G and a blue color filter unit B;

one red color filter unit R, one green color filter unit G and one blue color filter unit B form a pixel unit; and

the monochromatic color filter units in a same pixel unit are not in contact with each other, and projections of any two adjacent monochromatic color filter units on the array substrate have an overlapping region.

9. The OLED display panel according to claim 8, wherein among the plurality of monochromatic color filter units of the same pixel unit, a surface of each monochromatic filter unit facing the array substrate and a surface of its adjacent monochromatic filter unit facing the array substrate are not provided in a same plane.

10. The OLED display panel according to claim 2, wherein the first thin film packaging layer and the second thin film packaging layer are seamlessly connected with each other to form an integral thin film packaging layer.

11. The OLED display panel according to claim 2, wherein the first thin film packaging layer and the second thin film packaging layer are made of silicon nitride, silicon oxide or silicon oxynitride.

12. The OLED display panel according to claim 1, wherein the bonding adhesive is a dam adhesive, a filling adhesive, a face sealing, an optically clear adhesive (OCA) or an optically clear resin (OCR).

13. The OLED display panel according to claim 1, wherein the first thin film packaging layer is of a single-layer structure or a multilayer structure.

14. The OLED display panel according to claim 2, wherein the second thin film packaging layer is of a single-layer structure or a multilayer structure.

15. A display device, comprising an OLED display panel according to claim 1.

16. A fabrication method of an OLED display panel of claim 1, comprising:

forming the OLED layer having the plurality of organic light emitting diodes (OLEDs) on the array substrate;

forming the first thin film packaging layer on the OLED layer;

forming the color filter layer on the first thin film packaging layer;

filling a bonding adhesive;

bonding the package cover plate to the bonding adhesive.

17. The fabrication method according to claim 16, wherein the color filter layer comprises a plurality of monochromatic color filter units corresponding to sub-pixel units of the display panel one by one, and the plurality of the monochromatic color filter units are formed on the thin film packaging layer by thermal evaporation, interference filter coating or laser transfer coating.