Flexible OLED Display Panel Stress Relief Slots
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Solution Overview
Problem
Flexible OLED displays are prone to cracking under external forces and stress due to bending, curling, or laser lift-off, affecting the array substrate, metal traces, and inorganic layers, leading to screen failure.
Innovation Solution
Incorporating slots in the inorganic layer between adjacent pixel rows in the bending area of the display panel, filled with an organic photoresist layer, to alleviate stress on the metal traces and improve bending resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible OLED display is bent or curled, then the display can achieve flexible form factors, but the inorganic layer and metal traces are prone to cracking due to stress and strain
Solution Approach 1:
The patent introduces slots in the inorganic layer at the bending area, dividing the continuous inorganic layer into segmented regions. These slots act as stress release zones that prevent crack propagation through the entire layer, allowing the display to bend without compromising the integrity of the inorganic layer and metal traces.
2Duration of action of stationary object
If slots are introduced in the inorganic layer to reduce stress, then bending durability is improved, but the structural integrity and continuity of the inorganic layer may be compromised
Solution Approach 1:
The slots are strategically positioned only in the bending area of the inorganic layer, not throughout the entire layer. This localized modification allows stress release where needed while preserving the continuity and integrity of the inorganic layer in non-bending areas, maintaining both bending durability and structural stability.
Data Source
AI summary
A display panel includes a bending area and a non-bending area connected to the bending area. The display panel includes an array substrate. The array substrate includes a plurality of first pixel regions arranged in a plurality of rows parallel to each other and disposed in the bending area, and a plurality of second pixel regions arranged in a plurality of rows parallel to each other and disposed in the non-bending area; a plurality of flexible connection regions is formed for connecting adjacent ones of the first pixel regions, and for connecting the first pixel regions and the second pixel regions, wherein each flexible connection region has a slot, and the slot is filled with an organic photoresist layer.