Pixel Isolation Openings in Display Panels to Contain Damage Spread
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Solution Overview
Problem
Existing display devices face challenges in maintaining reliability and minimizing damage from external impacts and electrostatic discharges, particularly in preventing damage propagation across pixel regions.
Innovation Solution
The display device incorporates a specific layer structure including a substrate, semiconductor layers, gate insulating layers, storage electrodes, interlayer insulating layers, data lines, and driving voltage lines, with an opening surrounding pixel circuit regions to separate them and an organic interlayer insulating material filling this opening to enhance pixel independence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel circuit regions are separated by openings filled with organic interlayer insulating material, then reliability is improved by preventing damage propagation, but device complexity increases due to additional layer structure
Solution Approach 1:
The display device divides the pixel circuit regions into separate isolated islands using openings filled with organic interlayer insulating material. This segmentation physically isolates adjacent pixel circuits, preventing damage from external impacts or electrostatic discharges from propagating across regions, thereby improving reliability while managing the added structural complexity through functional partitioning
2Reliability
If openings are formed to surround pixel circuit regions, then pixel independence is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The organic interlayer insulating material is formed to fill the openings before subsequent electrode and wiring layer formations. This preliminary action ensures that the openings are properly prepared and isolated early in the manufacturing process, facilitating precise formation of surrounding electrodes and interlayer connections while maintaining pixel independence
3Reliability
If the opening extends through multiple layers including buffer and barrier layers, then damage propagation is more effectively prevented, but manufacturing complexity increases
Solution Approach 1:
The opening structure extends through multiple functional layers including the buffer layer and barrier layer, creating deep physical isolation between pixel circuit regions. This multi-layer segmentation approach effectively blocks damage propagation pathways while the organic interlayer insulating material fills the openings to provide electrical isolation and structural support, managing the manufacturing complexity through systematic layer-by-layer construction
Data Source
AI summary
An embodiment of a display device includes a substrate, a semiconductor layer, a first gate insulating layer, a gate electrode, a second gate insulating layer, a first storage electrode, a first interlayer insulating layer, a second interlayer insulating layer, a data line, and a driving voltage line. The semiconductor layer is disposed on the substrate. The first gate insulating layer is disposed on the semiconductor layer. The gate electrode is positioned on the first insulating layer. The second gate insulating layer is disposed on the gate electrode. The first storage electrode is positioned on the second gate insulating layer. The first interlayer insulating layer is disposed on the first storage electrode and has an opening surrounding the semiconductor layer, the gate electrode, and the first storage electrode. The second interlayer insulating layer is disposed on the first interlayer insulating layer and fills the opening. The data line and the driving voltage line are positioned on the second interlayer insulating layer. The semiconductor layer, the gate electrode, and the storage electrode are included in a pixel region. The display device includes a plurality of pixel regions. The data line and the driving voltage line cross the pixel circuit region. A portion of the semiconductor layer is in contact with the second interlayer insulating that fills the opening.