Flexible Display Supporting Plate Bending Structures
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Solution Overview
Problem
In flexible OLED screen modules, the difference in mechanical properties between the stainless steel supporting plate and the optically clear adhesive layer leads to viscoplastic deformation, causing protrusions and failure issues such as stripping and separation during repeated bending.
Innovation Solution
A supporting plate with a bending part that includes multiple bending units with first and second bending parts, which have bending structures that bend back and forth in opposite directions, connected by direction-changing parts, compensating for deformation differences and distributing forces evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid stainless steel supporting plate is used to provide structural support, then the mechanical strength and stability of the display module are improved, but the deformation consistency and reliability during repeated bending deteriorate due to the large elastic modulus mismatch with the OCA layer
Solution Approach 1:
The supporting plate is segmented into a rigid main body portion and a flexible bending portion with multiple bending units. This segmentation allows different regions to serve different functions: the main body provides structural strength while the bending portion accommodates deformation through multiple bending structures that bend back and forth in opposite directions, preventing force accumulation and maintaining reliability during repeated bending.
Solution Approach 2:
Different regions of the supporting plate are designed with different mechanical properties. The main body uses rigid stainless steel for strength, while the bending portion uses a structure with lower elastic modulus to match the OCA layer's deformation characteristics. This local quality differentiation ensures that each region performs its specific function optimally without compromising overall system reliability.
2Ease of manufacture
If a single rigid supporting plate structure is used, then manufacturing simplicity is maintained, but deformation consistency during bending deteriorates due to force accumulation at connection points
Solution Approach 1:
The supporting plate is divided into multiple functional segments including the main body and multiple bending units with bending structures. While this increases structural complexity, each segment is designed to perform a specific deformation function that collectively achieves consistent overall deformation, preventing localized force accumulation and improving deformation precision during bending operations.
3Reliability
If the supporting plate is made completely flexible to improve bending consistency, then the deformation match with OCA layer is improved, but the mechanical strength and protective capability deteriorate
Solution Approach 1:
The supporting plate is segmented into a rigid main body for strength and flexible bending units for deformation consistency. This segmentation allows the system to simultaneously achieve both mechanical strength and bending consistency by distributing different functional requirements to different segments.
Solution Approach 2:
Different regions of the supporting plate are assigned different mechanical properties: the main body maintains high rigidity for structural strength and protection, while the bending portions are designed with flexibility to match the OCA layer's deformation characteristics, achieving local optimization of both strength and consistency requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the risk of failure during bending by accumulating deformation in the bending part, preventing force accumulation and ensuring consistent deformation, thereby improving the bending fatigue characteristics of the display module.
Implementation Method 1
the first bending part includes a plurality of bending structures that bend back and forth in two opposite directions
Implementation Method 2
accumulating deformation in the bending part, preventing force accumulation
Data Source
AI summary
A supporting plate and a display module are provided. In the supporting plate, a bending part is connected between a first supporting main body and a second supporting main body. The bending part includes a first bending part. An end of the first bending part is connected to the first supporting main body, and another end of the first bending part is connected to the second supporting main body. Along a direction from the first supporting main body to the second supporting main body, the first bending part has a plurality of bending structures that bend back and forth in two opposite directions.