Display Module Counter Electrode Segmentation for Moisture Resistance
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Solution Overview
Problem
Display devices with exposed electronic modules beneath the display panel face issues with moisture and contaminant permeation through the electrode, compromising reliability and display quality.
Innovation Solution
A display device design featuring a disconnected counter electrode, utilizing a protrusion pattern and anti-deposition pattern with specific aromatic hydrocarbon compounds to prevent moisture permeation, and an encapsulation layer to protect the display panel layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the electronic module is disposed beneath the display panel with a hole to expose the module, then the display area is enlarged, but moisture and contaminants can permeate through the electrode compromising reliability
Solution Approach 1:
The counter electrode is divided into multiple disconnected segments by the anti-deposition pattern, preventing continuous moisture permeation paths through the electrode layer while maintaining electrical functionality in each segment
Solution Approach 2:
The anti-deposition pattern acts as an intermediary layer between the counter electrode and the hole area, preventing direct contact and moisture permeation through the electrode while allowing the electrode to maintain its electrical function
2Reliability
If the electrode is continuous to ensure electrical conductivity, then electrical function is maintained, but moisture can permeate through the continuous electrode structure
Solution Approach 1:
The counter electrode is segmented into disconnected portions by the anti-deposition pattern, creating breaks in the continuous structure that block moisture permeation paths while preserving electrical conductivity within each segmented region
Solution Approach 2:
The anti-deposition pattern is selectively applied in the hole area to create local discontinuities in the counter electrode, providing moisture barrier functionality specifically where needed without compromising the overall electrical conductivity of the electrode
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the reliability and display quality by preventing moisture and contaminants from penetrating through the electrode, ensuring the integrity of the display device.
Implementation Method 1
an anti-deposition pattern directly disposed on a bottom surface of the protrusion pattern, wherein the counter electrode is disconnected by the anti-deposition pattern
Implementation Method 2
prevents moisture and other contaminants from permeating and transmitting through an electrode
Data Source
AI summary
A display module includes a base layer in which a module hole is defined, a light emitting element including a pixel electrode disposed on the base layer, a counter electrode, and a functional layer, a protrusion pattern disposed between the base layer and the pixel electrode and that defines a pattern hole, a first insulating layer disposed between the base layer and the protrusion pattern and that defines a first opening overlapping the pattern hole, a second insulating layer disposed between the protrusion pattern and the pixel electrode and that defines a second opening overlapping the pattern hole, and an anti-deposition pattern directly disposed on a bottom surface of the protrusion pattern. The counter electrode is disconnected by the anti-deposition pattern and includes a first portion disposed in the first opening and a second portion disposed in the second opening, exhibiting excellent reliability characteristics.