Rollable Display Panel Substrate with Variable Thickness and Slit Grooves
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Solution Overview
Problem
Current rollable display panels face challenges in achieving optimal flexibility and durability due to variations in substrate thickness and groove design, which can lead to damage during attachment and bending processes.
Innovation Solution
A rollable display panel design featuring a substrate with alternating thickness portions and slit grooves, where the first portion has a larger thickness and the second portion is thinner, with filling members in the grooves to enhance flexibility and prevent damage during bending and rolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the substrate thickness is reduced to enable rolling, then flexibility is improved, but durability and resistance to damage during bending are worsened
Solution Approach 1:
The substrate is designed with non-uniform thickness, featuring a first portion with greater thickness and a second portion with lesser thickness. This local variation in thickness allows different regions of the substrate to have different mechanical properties, enabling the thinner region to be more flexible for rolling while the thicker region provides enhanced strength and durability to prevent damage during bending and attachment processes.
2Adaptability or versatility
If the substrate is made thinner for rolling capability, then flexibility is improved, but the risk of damage during attachment processes increases
Solution Approach 1:
The substrate incorporates a first portion with greater thickness specifically positioned to provide enhanced durability during attachment processes, while the second portion with lesser thickness enables rolling capability. This localized thickness differentiation allows the substrate to simultaneously achieve both rolling functionality and attachment reliability without compromising either aspect.
3Adaptability or versatility
If filling members are added to the slit grooves, then flexibility during bending is improved, but device complexity increases
Solution Approach 1:
The substrate includes slit grooves that divide the structure into segmented regions, with filling members positioned within these grooves. This segmentation allows the filling members to independently provide flexibility enhancement during bending without requiring complex modifications to the entire substrate structure. The filling members act as discrete elements that simplify the overall design compared to alternative approaches that would require more integrated complex structures.
Data Source
AI summary
Disclosed is a display panel including a substrate including a first portion having a first thickness and a second portion adjacent to the first portion in a first direction. The second portion has a second thickness smaller than the first thickness. The display panel includes a circuit layer disposed on the substrate and an element layer disposed on the circuit layer. A plurality of slit grooves extending along a second direction crossing the first direction and recessed in a thickness direction of the substrate are defined on a bottom surface of the first portion of the substrate.