Flexible Display Panel Valley Hole Cushioning
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Solution Overview
Problem
Flexible display panels are vulnerable to external impacts and stresses caused by folding, leading to damage of transistors and abnormal operation of pixels.
Innovation Solution
A display panel design featuring a base layer with a boundary region, lower insulating layers defining a valley hole, a first conductive pattern inside the valley hole, and a first organic layer filling the valley hole and covering the conductive pattern, along with pixel circuits and light-emitting elements electrically connected to the conductive pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display panel is designed to be foldable and changeable, then portability and user convenience are improved, but the panel becomes vulnerable to external impacts and stress from folding, causing transistor damage and pixel malfunction
Solution Approach 1:
The patent applies beforehand cushioning by introducing a recess structure between pixel regions that fills with organic material to create a cushioning layer. This recess is designed in advance to absorb external impacts and reduce stress concentration on transistors and pixels during folding operations, thereby protecting the display panel components from damage while maintaining shape changeability
2Adaptability or versatility
If the display panel structure is simplified for flexibility, then ease of folding is improved, but protection against external impact is reduced
Solution Approach 1:
The patent applies local quality by creating a recess structure at specific locations between pixel regions where impact protection is most needed. The organic material filling the recess provides localized cushioning and stress distribution exactly where transistors are vulnerable during folding, rather than requiring uniform structural reinforcement across the entire panel
Data Source
AI summary
A display panel includes a base layer including a boundary region extending in a first direction, a first pixel region adjacent to the boundary region in a second direction, and a second pixel region spaced apart from the first pixel region with the boundary region therebetween, lower insulating layers above the base layer, and defining a valley hole corresponding to the boundary region, a first conductive pattern including a portion inside the valley hole, a first organic layer including a portion above the lower insulating layers, and a portion covering the first conductive pattern and filling the valley hole, pixel circuits respectively overlapping the first and second pixel regions, light-emitting elements above the first organic layer, respectively overlapping the first and second pixel regions, and respectively electrically connected to the pixel circuits, and a second conductive pattern above the first organic layer, and including a portion overlapping the boundary region.