Flexible display panel and display device

Patent metadata

Field	Value
Publication number	US-10693090-B2
Application number	US-201816167465-A
Country	US
Kind code	B2
Filing date	Oct 22, 2018
Priority date	Jul 9, 2018
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A flexible display panel and a display device are provided. The flexible display panel includes a flexible substrate, and an inorganic film layer located on the flexible substrate. The inorganic film layer includes a first portion and a second portion. The first portion is connected with the second portion, and the first portion has a first thickness T1. Further, the second portion has a second thickness T2, and T1<T2, and the first portion includes at least one first sub-portion and at least one second sub-portion. The first sub-portion is smoothly connected with the second sub-portion at a boundary line extending in a first direction, and from the boundary line, a dimension of the second sub-portion in the first direction gradually changes in a direction away from the first sub-portion.

First claim

The invention claimed is:

1. A flexible display panel, comprising:
a flexible substrate; and
an inorganic film layer located on the flexible substrate, wherein
the inorganic film layer comprises a first portion and a second portion, the first portion is connected with the second portion, the first portion has a first thickness T 1 , the second portion has a second thickness T 2 , and T 1 <T 2 , and
the first portion comprises at least one first sub-portion and at least one second sub-portion, the first sub-portion is connected with the second sub-portion at a boundary line extending in a first direction, a length of an end of the first sub-portion at the boundary line in first direction is the same as a length of an end of the second sub-portion at the boundary line in the first direction such that the end of the first sub-portion smoothly joins with the end of the second sub-portion at the boundary line, and from the boundary line, a dimension of the second sub-portion in the first direction gradually changes in a direction away from the first sub-portion.

2. The flexible display panel according to claim 1 , wherein
from the boundary line, the dimension of the second sub-portion in the first direction gradually increases in the direction away from the first sub-portion.

3. The flexible display panel according to claim 2 , wherein
the second sub-portion has at least one first side, the first side is connected with the boundary line and has an arc shape.

4. The flexible display panel according to claim 3 , wherein
the first sub-portion has at least one second side, the second side is connected with the first side at the boundary line, and a tangent of the first side at a position at which the first side is connected with the boundary line coincide with the second side.

5. The flexible display panel according to claim 2 , wherein
the second sub-portion has at least one first side, the first sub-portion has at least one second side, the first side is connected with the second side at the boundary line, the first side is a straight line, and an angle α between the first side and the second side meets: 90°<α<180°.

6. The flexible display panel according to claim 1 , wherein
from the boundary line, the dimension of the second sub-portion in the first direction gradually decreases in the direction away from the first sub-portion, and
the second sub-portion has at least one first side, the first side is connected with the boundary line and has an arc shape.

7. The flexible display panel according to claim 1 , wherein
the second sub-portion has an axisymmetric shape, and a symmetry axis of the second sub-portion is perpendicular to the first direction.

8. The flexible display panel according to claim 1 , wherein
the flexible substrate comprises a display region and a non-display region surrounding the display region, and
the first sub-portion is located at least in the display region, the number of first sub-portions is at least two, the at least two first sub-portions extend in a second direction and are arranged in the first direction, and the second direction intersects with the first direction.

9. The flexible display panel according to claim 8 , wherein
the first portion further comprises at least one third sub-portion, the third sub-portion is located in the non-display region and extends in the first direction,
from the boundary line, the dimension of the second sub-portion in the first direction gradually increases in the direction away from the first sub-portion, and
the first sub-portion is connected with the third sub-portion via the second sub-portion.

10. The flexible display panel according to claim 9 , wherein
the first portion further comprises at least one fourth sub-portion and at least one fifth sub-portion, the fourth sub-portion and the fifth sub-portion are located in the non-display region, and the fourth sub-portion extends in the second direction,
the fourth sub-portion is connected with the third sub-portion via the fifth sub-portion, and
from a position at which the fifth sub-portion is connected with the fourth sub-portion to a position at which the fifth sub-portion is connected with the third sub-portion, a dimension of the fifth sub-portion in the first direction gradually increases.

11. The flexible display panel according to claim 9 , wherein
each of the first sub-portion and the third sub-portion has a rectangular shape.

12. The flexible display panel according to claim 8 , wherein
the first sub-portion has a first end and a second end which are opposite to each other,
from the boundary line, a dimension of the second sub-portion connected with the first end in the first direction gradually increases in the direction away from the first sub-portion,
from the boundary line, a dimension of the second sub-portion connected with the second end in the first direction gradually decreases in the direction away from the first sub-portion, and
the first end and the second end are alternately arranged in the first direction.

13. The flexible display panel according to claim 1 , wherein T 1 <0.5*T 2 .

14. The flexible display panel according to claim 1 , wherein
the flexible display panel further comprises a buffer layer, a thin film transistor array layer, a light-emitting element layer and a thin film encapsulation layer,
the buffer layer is located on the flexible substrate,
the thin film transistor array layer is located on a side of the buffer layer away from the flexible substrate, and the thin film transistor array layer comprises an active layer, a gate insulating layer, a gate layer, an insulating interlayer and a source-drain layer,
the light-emitting element layer is located on a side of the thin film transistor array layer away from the flexible substrate,
the thin film encapsulation layer is located on a side of the light-emitting element layer away from the thin film transistor array layer, the thin film encapsulation layer covers the light-emitting element layer, and the thin film encapsulation layer comprises at least one first inorganic layer, and
the inorganic film layer comprises at least one of the buffer layer, the gate insulating layer, the insulating interlayer and the first inorganic layer.

15. The flexible display panel according to claim 1 , wherein
the flexible display panel further comprises a buffer layer, a thin film transistor array layer, a light-emitting element layer and a thin film encapsulation layer,
the buffer layer is located on the flexible substrate,
the thin film transistor array layer is located on a side of the buffer layer away from the flexible substrate, and the thin film transistor array layer comprises an active layer, a gate insulating layer, a gate layer, an insulating interlayer, a source-drain layer and a passivation layer,
the light-emitting element layer is located on a side of the thin film transistor array layer away from the flexible substrate,
the thin film encapsulation layer is located on a side of the light-emitting element layer away from the thin film transistor array layer, the thin film encapsulation layer covers the light-emitting element layer, and the thin film encapsulation layer comprises the at least one first inorganic layer, and
the inorganic film layer comprises at least one of the buffer layer, the gate insulating layer, the insulating interlayer, the passivation layer and the first inorganic layer.

16. The flexible display panel according to claim 9 , wherein
the flexible display panel further comprises a retaining wall, which is located on a side of

Assignees

• Shanghai Tianma Micro Elect Co

Inventors

• Zhai Yingteng
• Wu Yong

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8731

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

• H10K59/873

  Encapsulations · CPC title

• H10H20/854

  characterised by their material, e.g. epoxy or silicone resins · CPC title

• H10H20/819

  characterised by their shape, e.g. curved or truncated substrates · CPC title