Display device, display panel, and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-12302709-B2
Application number	US-202117781056-A
Country	US
Kind code	B2
Filing date	May 20, 2021
Priority date	Jun 29, 2020
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

A display device, a display panel, and a manufacturing method therefor are provided. The display panel includes a flexible substrate, a display layer on one side of the flexible substrate, and an encapsulation layer covering a surface of the display layer away from the flexible substrate. The display layer has a stretching area provided with a plurality of pixel islands spaced apart and a through-hole. A blocking dam is in an area corresponding to the pixel island and surrounds a plurality of light-emitting units. The encapsulation layer includes an organic layer that is in the stretching area and confined within an annular area surrounded by the blocking dam.

First claim

What is claimed is:

1. A display panel, comprising:
a flexible substrate;
a display layer, on one side the flexible substrate, having a stretching area, and comprising a pixel definition layer and a blocking dam, the blocking dam being in an annulus shape on a surface of the pixel definition layer away from the flexible substrate, wherein
a plurality of pixel islands spaced apart and a through-hole between two pixel islands are in the stretching area;
the pixel definition layer defines a plurality of light-emitting units; and
the blocking dam is in an area of the pixel definition layer corresponding to one of the plurality of pixel islands and surrounding more than one light-emitting unit of the plurality of light-emitting units; and

an encapsulation layer covering a surface of the display layer away from the flexible substrate and comprising an organic layer, wherein
a portion of the organic layer in the stretching area is confined within an annular area surrounded by the blocking dam;
wherein the display layer further comprises:
a drive layer between the flexible substrate and the pixel definition layer;
a first electrode layer on a surface of the drive layer away from the flexible substrate and comprising at least a plurality of first electrodes, wherein more than one first electrode of the plurality of first electrodes is in the stretching area, and the pixel definition layer has a plurality of openings for exposing the plurality of first electrodes;
a light-emitting material layer filled within the plurality of openings and in contact with the plurality of first electrodes; and
a second electrode layer covering the pixel definition layer, the light-emitting material layer, and the blocking dam, raised in an area corresponding to the blocking dam in a direction away from the drive layer to form a rib being in an annulus shape, wherein the portion of the organic layer in the stretching area is confined within an annular area surrounded by the rib.

2. The display panel according to claim 1 , wherein the display layer further has a non-stretching area adjacent to the stretching area, and the non-stretching area comprises a transition area and a main display area; and
the transition area is between the main display area and the stretching area and separates the main display area from the stretching area, and provided with at least one blocking groove, and a portion of the organic layer in the transition area is at least partially within the at least one blocking groove.

3. The display panel according to claim 2 , wherein a portion of the pixel definition layer in the transition area is provided with a recess, and the second electrode layer forms the at least one blocking groove matching the recess in an area corresponding to the recess.

4. The display panel according to claim 2 , wherein
the plurality of light-emitting units are divided into a plurality of pixels, one of the plurality of pixels comprises more than one light-emitting unit, and the stretching area, the transition area and the main display area are provided with the plurality of pixels disposed in an array; and
one of the plurality of light-emitting units comprises the first electrode layer, the light-emitting material layer and the second electrode layer that are corresponding to one of the plurality of openings.

5. The display panel according to claim 4 , wherein a density of pixels in the transition area is equal to a density of pixels in the stretching area, and the density of pixels in the transition area and the density of pixels in the stretching area are less than a density of pixels in the main display area.

6. The display panel according to claim 4 , wherein
the plurality of light-emitting units comprise a plurality of blue light-emitting units, a plurality of green light-emitting units and a plurality of red light-emitting units;
a pixel in the stretching area is a first pixel, a pixel in the transition area is the first pixel, and a pixel in the main display area is a second pixel; and
the first pixel comprises a red light-emitting unit, a green light-emitting unit, and a blue light-emitting unit, and the second pixel comprises a red light-emitting unit, two green light-emitting units and a blue light-emitting unit.

7. The display panel according to claim 6 , wherein
in the first pixel, the red light-emitting unit and the blue light-emitting unit are in a same row, and the green light-emitting unit is in a different row from the red light-emitting unit and is between the red light-emitting unit and the blue light-emitting unit;
in first pixels in a same row, red light-emitting units and blue light-emitting units are in a same row, and green light-emitting units are in a same row;
one row of light-emitting units in one row of first pixels and one row of light-emitting units in one row of second pixels are in a same row; and
in a same column of first pixels and second pixels, light-emitting units of a same color are in a same column.

8. The display panel according to claim 2 , wherein the at least one blocking groove comprises a plurality of blocking grooves that are divided into at least one blocking unit, and the plurality of blocking grooves in the at least one blocking unit are spaced along a column direction; and the at least one blocking unit is provided between two columns of pixels.

9. The display panel according to claim 8 , wherein the at least one blocking unit comprises a plurality of blocking units disposed in a row direction, and a density of the plurality of blocking units decreases from the stretching area towards the main display area.

10. The display panel according to claim 8 , wherein a distance between two adjacent blocking grooves in a same blocking unit of the at least one blocking unit, is equal to, a width of one of the two adjacent blocking grooves in an extension direction of the at least one blocking unit.

11. The display panel according to claim 2 , wherein the display layer is shaped as a polygon;
at least one top corner of the polygon is provided with the stretching area, the stretching area extends inwardly from the top corner of the display layer, and the stretching area is surrounded by the transition area.

12. The display panel according to claim 11 , wherein the display layer is shaped as a rectangle and provided with four stretching areas.

13. The display panel according to claim 2 , wherein the display layer is further divided into a flat portion and a bendable portion surrounding the flat portion, and the bendable portion is bendable towards a side of the flexible substrate away from the display layer;
the flat portion is part of the main display area; and
the stretching area, at least part of the transition area and at least part of the main display area are outside the flat portion and together form the bendable portion.

14. The display panel according to claim 2 , wherein the encapsulation layer further comprises:
a first inorganic layer, covering the surface of the display layer away from the flexible substrate, raised in the area corresponding to the blocking dam, and recessed in an area corresponding to the at least one blocking groove; wherein the organic layer is on a surface of the first inorganic layer away from the flexible substrate; and
a second inorganic layer, cladding the organic layer and in contact with the first inorganic layer in the area corresponding to the blocking dam.

15. The display panel according to claim 7 , wherein the display layer further comprises a plurality of support columns, on a same layer as the blocking dam, on the surface of the pix

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yu Yang
• Cao Fangxu
• Wang Pinfan
• Li Wenqiang
• Wang Bo
• Wang Jingquan

Classifications

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K2102/311

  Flexible OLED · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title