Flexible Display Power Wiring Irregular Structure

Solution Overview

Problem

Flexible OLED displays face issues with the encapsulation layer stripping and falling off during bending, leading to display defects due to inadequate attachment force between the encapsulation layer and the power supply wiring layer.

Innovation Solution

The display panel incorporates a power supply wiring layer with an irregular structure that overlaps with the encapsulation layer, featuring nonlinear shapes and protrusions/hollowed-out parts to increase the contact area and attachment force, ensuring a secure connection between the layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the encapsulation layer is made thin for flexibility, then the flexibility and portability are improved, but the attachment force between the encapsulation layer and power supply wiring layer is insufficient causing stripping during bending

Engineering Contradiction:

ImproveflexibilityVSAvoidattachment force

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The power supply wiring layer is designed with a wavy or meandering configuration instead of a straight line, creating a curved path that increases the contact area with the encapsulation layer. This curvature allows the wiring to better conform to the flexible substrate and maintain attachment force during bending operations.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The wiring structure transitions from a one-dimensional straight line to a two-dimensional wavy pattern, effectively increasing the contact length and surface area between the power supply wiring layer and the encapsulation layer without increasing the overall device footprint.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Device complexity

If the power supply wiring layer uses a straight line configuration, then the device complexity is reduced, but the contact area with the encapsulation layer is insufficient leading to poor attachment

Engineering Contradiction:

Improvewiring configurationVSAvoidcontact area

Core Design Contradiction:

Device complexityVSArea of stationary object

Solution Approach 1:

The power supply wiring layer is designed with a wavy or meandering configuration instead of a straight line, creating a curved path that increases the contact area with the encapsulation layer. This curvature allows the wiring to better conform to the flexible substrate and maintain attachment force during bending operations.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The wiring structure transitions from a one-dimensional straight line to a two-dimensional wavy pattern, effectively increasing the contact length and surface area between the power supply wiring layer and the encapsulation layer without increasing the overall device footprint.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS10872949B2Display panel and display device

Publication Date: 2020.12.22 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure provides a display panel and a display device. The display panel includes a power supply wiring layer on a base substrate and an encapsulation layer on a side of the power supply wiring layer distal to the base substrate. The power supply wiring layer and the encapsulation layer at least partially overlap, and a part of the power supply wiring layer overlapping with the encapsulation layer has an irregular structure for increasing a contact area between the power supply wiring layer and the encapsulation layer.