Display Panel Barrier Layer Adhesion via Organic Film Segmentation

Solution Overview

Problem

In OLED display panels, the control chip is prone to falling off in high temperature and high humidity environments due to poor adhesion between the organic film layer and the barrier layer, which results in signal wire breakage and display issues.

Innovation Solution

A display panel design that includes a base substrate with contact electrodes, an inorganic film layer on one side of the contact electrodes, an organic film layer on the other side, and a barrier layer covering the organic film layer. The organic film layer has openings in the gaps between adjacent contact electrodes, allowing the barrier layer to contact the inorganic film layer, enhancing adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the organic film layer is continuous covering the contact electrodes, then the display panel structure is simple and manufacturing is easy, but the adhesion between the barrier layer and inorganic film layer is poor causing the control chip to fall off in high temperature and high humidity environments

Engineering Contradiction:

Improveadhesion strengthVSAvoidfilm layer structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The organic film layer is segmented by forming openings in the gaps between adjacent contact electrodes, dividing the continuous film into separate sections. This segmentation allows the barrier layer to directly contact the inorganic film layer at multiple points, significantly improving adhesion strength and preventing control chip detachment in harsh environments.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The film layer structure is modified locally at the gaps between contact electrodes by creating openings in the organic film layer. This local modification enables direct contact between the barrier layer and inorganic film layer at critical adhesion points, while maintaining the overall simplicity of the continuous film structure elsewhere.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If the organic film layer is continuous covering the contact electrodes, then the manufacturing process is simple, but the control chip is prone to falling off in high temperature and high humidity environments

Engineering Contradiction:

Improvefilm layer fabricationVSAvoidcontrol chip attachment

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The organic film layer is segmented by forming openings in the gaps between adjacent contact electrodes, dividing the continuous film into separate sections. This segmentation allows the barrier layer to directly contact the inorganic film layer at multiple points, significantly improving adhesion strength and preventing control chip detachment in harsh environments.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The openings in the organic film layer act as intermediaries that enable direct contact between the barrier layer and inorganic film layer. This intermediary structure improves adhesion at the critical interface without requiring additional bonding materials or complex processing steps.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If the barrier layer is separated from the inorganic film layer, then the film layer structure is simple, but signal wire breakage occurs and display quality deteriorates

Engineering Contradiction:

Improvefilm layer configurationVSAvoidsignal integrity

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The organic film layer is segmented by forming openings in the gaps between adjacent contact electrodes, dividing the continuous film into separate sections. This segmentation allows the barrier layer to directly contact the inorganic film layer at multiple points, significantly improving adhesion strength and preventing control chip detachment in harsh environments.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The openings in the organic film layer act as intermediaries that enable direct contact between the barrier layer and inorganic film layer. This intermediary structure improves adhesion at the critical interface without requiring additional bonding materials or complex processing steps.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12207508B2Display panel and display device

Publication Date: 2025.01.21 CHONGQING BOE DISPLAY TECH CO LTD

AI summary

Provided in the present disclosure are a display panel and a display device. The display panel comprises: a base substrate; multiple contact electrodes, arranged on the base substrate in a non-display region of the display panel; an inorganic film layer, arranged on the side of the contact electrodes in proximity to the base substrate; the inorganic film layer comprising an inorganic material; an organic film layer, arranged on the side of the contact electrodes away from the base substrate; and a barrier layer, arranged on the side of the organic film layer away from the base substrate; the barrier layer comprising an inorganic material; and, the organic film layer being provided with openings in at least some gaps between adjacent contact electrodes.