Flexible array substrate and display panel

Patent metadata

Field	Value
Publication number	US-11049922-B2
Application number	US-201816464571-A
Country	US
Kind code	B2
Filing date	Sep 6, 2018
Priority date	Aug 3, 2018
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A flexible array substrate and a display panel are provided. The flexible array substrate comprises a flexible substrate, a buffer layer, a plurality of signal lines, and pixel electrodes. The buffer layer is disposed on the flexible substrate. The plurality of signal lines is disposed on the buffer layer. A shape of the signal lines in a cross-sectional direction of the flexible array substrate is a curved shape with undulating portions or a polyline shape with undulating portions. In the disclosure, the signal line that has a curved shape with undulating portions or a polyline shape with undulating portions is disposed on the buffer layer, so that the signal line is able to cope with bending stress when bending.

First claim

The invention claimed is:

1. A flexible array substrate, comprising:
a flexible substrate;
a buffer layer disposed on the flexible substrate;
a plurality of signal lines disposed on the buffer layer, the plurality of the signal lines intersecting with each other to form a plurality of pixel regions, wherein the signal lines comprise data lines and gate lines, the data lines are arranged in columns, the gate lines are arranged in rows, and the buffer layer comprises first buffer units configured to dispose the data lines at intervals and second buffer units which are configured to dispose the gate lines at intervals, and wherein each of the data lines is correspondingly disposed on a plurality of the first buffer units, each of the gate lines is correspondingly disposed on a plurality of the second buffer units, and the first buffer units and the second buffer units are arranged in an interlaced manner; and
pixel electrodes disposed in the pixel regions and electrically connected to the signal lines;
wherein an outer contour shape of the buffer layer in a cross-sectional direction of the flexible array substrate is a curved shape with undulating portions or a polyline shape with undulating portions, so that the signal lines are in a shape of the curved shape or the polyline shape;
wherein the curved shape with the undulating portions is a wavy linear curved shape or a pulse-shaped curved shape, and wherein the buffer layer is constituted by a plurality of unit layers, a through hole or a groove is disposed on each of the unit layers to release a bending stress;
wherein the flexible substrate comprises a bending zone for bending, a distance between two adjacent ones of the first buffer units in the same column located on the bending zone uniformly decreases from both sides of the bending zone to a central position of the bending zone, or a distance between two adjacent ones of the second buffer units in the same row located on the bending zone uniformly decreases from both sides of the bending zone to a central position of the bending zone, or both of the distance between the two adjacent ones of the first buffer units in the same column located on the bending zone and the distance between the two adjacent ones of the second buffer units in the same row located on the bending zone uniformly decreases from both sides of the bending zone to the central position of the bending zone.

2. A flexible array substrate, comprising:
a flexible substrate;
a buffer layer disposed on the flexible substrate;
a plurality of signal lines disposed on the buffer layer, the plurality of the signal lines intersecting with each other to form a plurality of pixel regions, wherein the signal lines comprise data lines and gate lines, the data lines are arranged in columns, the gate lines are arranged in rows, and the buffer layer comprises buffer units which are configured to dispose the data lines and the gate lines at intervals, and wherein each of the buffer units is disposed below an intersection of one of the data lines and one of the gate lines; and
pixel electrodes disposed in the pixel regions and electrically connected to the signal lines;
wherein an outer contour shape of the buffer layer in a cross-sectional direction of the flexible array substrate is a curved shape with undulating portions or a polyline shape with undulating portions, so that the signal lines are in a shape of the curved shape or the polyline shape;
wherein the flexible substrate comprises a bending zone for bending, a distance between two adjacent ones of the buffer units in the same column located on the bending zone uniformly decreases from both sides of the bending zone to a central position of the bending zone, or a distance between two adjacent ones of the buffer units in the same row located on the bending zone uniformly decreases from both sides of the bending zone to the central position of the bending zone, or both of the distance between two adjacent ones of the buffer units in the same column located on the bending zone and the distance between two adjacent ones of the buffer units in the same row located on the bending zone are uniformly decreasing from both sides of the bending zone to the central position of the bending zone.

3. The flexible array substrate according to claim 2 , wherein the curved shape with the undulating portions is a wavy linear curved shape or a pulse-shaped curved shape.

4. The flexible array substrate according to claim 1 , wherein the buffer layer is constituted by a plurality of unit layers, and a through hole or a groove is disposed on each of the unit layers to release a bending stress.

5. A display panel, comprising a flexible array substrate, an organic light emitting layer disposed on the flexible array substrate, and a cathode disposed on the organic light emitting layer;
the flexible array substrate, comprising:
a flexible substrate;
a buffer layer disposed on the flexible substrate;
a plurality of signal lines disposed on the buffer layer, the plurality of the signal lines intersecting with each other to form a plurality of pixel regions, wherein the signal lines comprise data lines and gate lines, the data lines are arranged in columns, the gate lines are arranged in rows, and the buffer layer comprises buffer units which are configured to dispose the data lines and the gate lines at intervals, and wherein each of the buffer units is disposed below an intersection of one of the data lines and one of the gate lines; and
pixel electrodes disposed in the pixel regions and electrically connected to the signal lines;
wherein an outer contour shape of the buffer layer in a cross-sectional direction of the flexible array substrate is a curved shape with undulating portions or a polyline shape with undulating portions, so that the signal line is in a shape of the curved shape or the polyline shape;
wherein the flexible substrate comprises a bending zone for bending, a distance between two adjacent ones of the buffer units in the same column located on the bending zone uniformly decreases from both sides of the bending zone to a central position of the bending zone, or a distance between two adjacent ones of the buffer units in the same row located on the bending zone uniformly decreases from both sides of the bending zone to the central position of the bending zone, or both of the distance between two adjacent ones of the buffer units in the same column located on the bending zone and the distance between two adjacent ones of the buffer units in the same row located on the bending zone are uniformly decreasing from both sides of the bending zone to the central position of the bending zone.

6. The display panel according to claim 5 , wherein the curved shape with the undulating portions is a wavy linear curved shape or a pulse-shaped curved shape.

7. The display panel according to claim 5 , wherein the buffer layer is constituted by a plurality of unit layers, and a through hole or a groove is disposed on each of the unit layers to release a bending stress.

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd

Inventors

• Tu Aiguo

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• G06F1/1643

  the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615) · CPC title

• G06F1/1652 Primary

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• H01L51/0097

  Electricity · mapped topic

• H01L27/3276 Primary

  Electricity · mapped topic