Flexible Display Panel Drop Resistance via Shrinkage Control
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Solution Overview
Problem
Portable data processors and display devices face reliability issues due to accidental drops, which can apply force and damage the internal components, and existing technologies do not adequately address the need for a highly convenient and reliable display panel, input/output device, or data processor.
Innovation Solution
A display panel design featuring a selection signal line, first and second signal lines that cross each other, connected to pixels and terminals with an insulating layer, and a flexible base with minimal shrinkage, allowing for reliable electrical connections and high-resolution image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid structure is used to maintain display panel stability, then structural stability is improved, but resistance to mechanical stress from drops is worsened
Solution Approach 1:
The patent employs a flexible base substrate that can deform under mechanical stress from drops and then return to its original shape. This flexibility allows the display panel to absorb impact energy without permanent deformation or component damage, resolving the contradiction between structural stability and drop resistance.
Solution Approach 2:
The patent incorporates adhesive layers and insulating layers between the base substrate and the light-emitting layer/second electrode layer structure. These layers serve as cushioning elements that absorb and distribute mechanical stress before it reaches the fragile light-emitting components, preventing damage while maintaining structural integrity.
2Object-affected harmful factors
If the base is made highly flexible to absorb impact, then resistance to mechanical stress is improved, but manufacturing precision is worsened
Solution Approach 1:
The patent specifies that the base substrate has a shrinkage rate of less than or equal to 3% after bending. This parameter control ensures that the flexible base maintains sufficient dimensional stability during and after manufacturing processes, allowing for precise alignment of the light-emitting layer and electrode layers while still providing adequate flexibility for impact absorption.
3Reliability
If adhesive strength between light-emitting layer and second electrode layer is increased to prevent damage, then reliability is improved, but device complexity is worsened
Solution Approach 1:
The patent combines the adhesive layer and insulating layer functions into a single integrated layer structure between the light-emitting layer and second electrode layer. This merged structure provides both strong adhesion to prevent delamination under mechanical stress and sufficient insulation, simplifying the overall device structure while maintaining high reliability.
Data Source
AI summary
A novel display panel that is highly convenient or reliable, a novel input/output device that is highly convenient or reliable, or a novel data processor that is highly convenient or reliable is provided. The display panel includes a selection signal line, a first signal line and a second signal line that cross the selection signal line, a first pixel electrically connected to the selection signal line and the first signal line, a second pixel electrically connected to the selection signal line and the second signal line, a first terminal electrically connected to the first signal line, and a second terminal electrically connected to the second signal line.