Display panel, method for fabricating display panel and displaying device

Patent metadata

Field	Value
Publication number	US-2024154074-A1
Application number	US-202117775980-A
Country	US
Kind code	A1
Filing date	Jun 22, 2021
Priority date	Jun 22, 2021
Publication date	May 9, 2024
Grant date	—

Abstract

The present application provides a display panel, a method for fabricating a display panel and a displaying device. The display panel particularly includes at least two neighboring displaying base plates; each of the them includes a flexible substrate and a transparent cover plate that are provided in stack; the flexible substrate is delimited into a displaying region, a bending region and a bonding region, the displaying region and the bonding region are connected by the bending region, the displaying region and the bonding region are parallel, and the bonding region is located on one side of the displaying region that is away from the transparent cover plate; the transparent cover plate is provided with a light shielding layer on one side that is closer to the flexible substrate, and an orthographic projection of the bending region on the transparent cover plate is within an area of the light shielding layer.

First claim

1 . A display panel, wherein the display panel comprises at least two neighboring displaying base plates;
each of the displaying base plates comprises a flexible substrate and a transparent cover plate that are provided in stack; the flexible substrate is delimited into a displaying region, a bending region and a bonding region, the displaying region and the bonding region are connected by the bending region, the displaying region and the bonding region are parallel, and the bonding region is located on one side of the displaying region that is away from the transparent cover plate; the transparent cover plate is provided with a light shielding layer on one side that is closer to the flexible substrate, and an orthographic projection of the bending region on the transparent cover plate is within an area of the light shielding layer; and the transparent cover plates of the two neighboring displaying base plates at least partially directly contact and abut.

2 . The display panel according to claim 1 , wherein a buffer layer, a trace layer, a first planarization layer, a passivation layer and a second planarization layer are provided in stack on the flexible substrate; and
each of the displaying region and the bonding region of the flexible substrate further comprises an electrode layer, and the electrode layer is located between the first planarization layer and the second planarization layer.

3 . The display panel according to claim 2 , wherein the displaying base plate further comprises a light emitting device and a circuit board;
the light emitting device is electrically connected to the electrode layer located at the displaying region, and the light emitting device is located on the one side of the transparent cover plate that is closer to the flexible substrate; and the circuit board is electrically connected to the electrode layer located at the bonding region.

4 . The display panel according to claim 3 , wherein the display panel further comprises a first adhesive layer provided on one side of the light emitting device that faces the transparent cover plate, and, a second adhesive layer provided between the neighboring light emitting devices.

5 . The display panel according to claim 4 , wherein an orthographic projection of the second adhesive layer on the transparent cover plate at least partially overlaps with the light shielding layer.

6 . The display panel according to claim 5 , wherein a color of the light shielding layer and a color of the second adhesive layer are the same.

7 . The display panel according to claim 1 , wherein a material of the light shielding layer is a black printing ink, a luminosity of the black printing ink is less than 20, and both of a red-green value and a yellow-blue value of the black printing ink are less than 0.05.

8 . The display panel according to claim 1 , wherein a material of the transparent cover plate comprises at least one of a glass and a transparent plastic.

9 . A method for fabricating a display panel, wherein the method comprises:
forming a flexible substrate on a rigid base, wherein the flexible substrate is delimited into a displaying region, a bending region and a bonding region; covering the flexible substrate with the transparent cover plate, wherein the transparent cover plate is provided with a light shielding layer on one side that is closer to the flexible substrate; removing the rigid base; bending the bending region of the flexible substrate, to obtain a displaying base plate, wherein an orthographic projection of the bending region on the transparent cover plate is within an area of the light shielding layer; and providing the transparent cover plates of at least two instances of the displaying base plate on a same side, wherein the transparent cover plates of two neighboring instances of the displaying base plates directly contact and abut, to obtain the display panel.

10 . The method according to claim 9 , wherein before the step of covering the flexible substrate with the transparent cover plate, the method further comprises:
forming a buffer layer, a trace layer, a first planarization layer, an electrode layer, a passivation layer and a second planarization layer on the flexible substrate, wherein the electrode layer is located at the displaying region and the bonding region.

11 . The method according to claim 10 , wherein before the step of bending the bending region of the flexible substrate, the method further comprises:
electrically connecting the light emitting device to the electrode layer located at the displaying region, and electrically connecting the circuit board to the electrode layer located at the bonding region; and forming a first adhesive layer on one side of the light emitting device that faces the transparent cover plate, and forming a second adhesive layer between neighboring light emitting devices.

12 . The method according to claim 9 , wherein the step of removing the rigid base comprises:
removing the rigid base by laser lift-off.

13 . A displaying device, wherein the displaying device comprises the display panel according to claim 1 .

14 . The displaying device according to claim 13 , wherein a buffer layer, a trace layer, a first planarization layer, a passivation layer and a second planarization layer are provided in stack on the flexible substrate; and
each of the displaying region and the bonding region of the flexible substrate further comprises an electrode layer, and the electrode layer is located between the first planarization layer and the second planarization layer.

15 . The displaying device according to claim 14 , wherein the displaying base plate further comprises a light emitting device and a circuit board;
the light emitting device is electrically connected to the electrode layer located at the displaying region, and the light emitting device is located on the one side of the transparent cover plate that is closer to the flexible substrate; and the circuit board is electrically connected to the electrode layer located at the bonding region.

16 . The displaying device according to claim 15 , wherein the display panel further comprises a first adhesive layer provided on one side of the light emitting device that faces the transparent cover plate, and, a second adhesive layer provided between the neighboring light emitting devices.

17 . The displaying device according to claim 16 , wherein an orthographic projection of the second adhesive layer on the transparent cover plate at least partially overlaps with the light shielding layer.

18 . The displaying device according to claim 17 , wherein a color of the light shielding layer and a color of the second adhesive layer are the same.

19 . The displaying device according to claim 13 , wherein a material of the light shielding layer is a black printing ink, a luminosity of the black printing ink is less than 20, and both of a red-green value and a yellow-blue value of the black printing ink are less than 0.05.

20 . The displaying device according to claim 13 , wherein a material of the transparent cover plate comprises at least one of a glass and a transparent plastic.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhu Xiaoyan
• Yang Jin
• Yuan Guangcai
• Lu Xinhong
• Li Ling

Classifications

• H10W90/00

  Package configurations · CPC title

• H10H20/0364

  of interconnections · CPC title

• H10H20/0362

  of encapsulations · CPC title

• H10H20/857 Primary

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H10H20/853 Primary

  characterised by their shape · CPC title