Flexible Display Panel Crimping Grooves for Rigidity Balance

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Solution Overview

Problem

Conventional flexible display panels face challenges in balancing crimpiness and flatness due to the trade-off between bending and crimping performance, which is affected by the thickness of the support plate, leading to inadequate rigidity and flatness after unfolding.

Innovation Solution

A flexible display panel design featuring a support plate with a crimping portion containing grooves and patterned structures that reduce bending rigidity while maintaining crimping performance, ensuring improved bending and flatness by distributing stress and maintaining adhesive layer integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the support plate is made thinner to improve bending and crimping performance, then the bending performance is improved, but the rigidity deteriorates

Engineering Contradiction:
Improvebending performanceVSAvoidrigidity
Core Design Contradiction:
Adaptability or versatilityVSStrength

Solution Approach 1:

The support plate is segmented by introducing grooves that divide the continuous structure into multiple regions. These grooves create discrete bending zones that allow the plate to flex more easily while the segments between grooves maintain structural integrity and rigidity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The support plate has non-uniform structure with grooves positioned at specific locations where bending is needed. The regions between grooves maintain full thickness and rigidity, while the groove areas provide flexibility. This local variation in structure allows different parts of the plate to have different mechanical properties.

Inventive Principle:
Principle #3Local quality

2Adaptability or versatility

If the support plate is made thinner to improve crimping performance, then the crimping performance is improved, but the flatness after unfolding deteriorates

Engineering Contradiction:
Improvecrimping performanceVSAvoidflatness
Core Design Contradiction:
Adaptability or versatilityVSShape

Solution Approach 1:

The grooves segment the support plate into rigid sections that maintain their shape after unfolding. This segmentation prevents the plate from collapsing or deforming permanently, ensuring it returns to a flat state while still allowing crimping during use.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The grooves introduce curved features into the otherwise flat support plate. These curved groove structures allow the plate to bend and crimp smoothly while maintaining overall flatness when not in use, as the grooves act as built-in curvature guides that preserve geometric integrity.

Inventive Principle:
Principle #14Spheroidality (Curvature)

3Adaptability or versatility

If the support plate is made thinner to improve flexibility, then the flexibility is improved, but the resistance to peeling and fracture deteriorates

Engineering Contradiction:
ImproveflexibilityVSAvoidresistance to peeling and fracture
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The grooves create segmented structures that distribute mechanical stress across multiple points rather than concentrating it at a single location. This segmentation prevents stress concentration that would lead to peeling or fracture, while still allowing the plate to flex.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The grooves are pre-positioned to act as stress-distribution features before bending occurs. They cushion and distribute the forces applied during bending and crimping, preventing excessive stress at any single point that would cause peeling or fracture of the adhesive layers.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS12167549B2Flexible display panel and display device
Publication Date: 2024.12.10 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD
  • US12167549B2 patent drawing
  • US12167549B2 patent drawing
  • US12167549B2 patent drawing

AI summary

The present application provides a flexible display panel and a display device. The display device includes a flexible display panel, and the flexible display panel includes a flexible display panel body and a support plate. A plurality of grooves are provided in a crimping portion of the support plate, and a plurality of first patterned structures are provided at a bottom of each of the grooves, so that a bending performance of the crimping portion can be improved while a rigidity of the crimping portion is ensured, thereby balancing crimpiness and flatness of the flexible display panel in the display device.