Flexible Display Strain Gauge Bending Deformation Monitoring

Solution Overview

Problem

Flexible display panels in portable terminals are vulnerable to permanent deformation and cracking due to repeated bending, which can lead to damage that is not immediately visible, making it difficult for users to identify and prevent strain tolerance limits.

Innovation Solution

Incorporating strain gauges on the surface of the flexible display panel to measure strain and generate a warning signal when the strain reaches a predetermined tolerance, allowing users to stop deformation before damage occurs, and storing data for analysis.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the flexible display panel is bent or folded to enhance portability, then the display device can be made compact and lightweight, but tensile force is applied to the outer surface causing cracks and permanent deformation

Engineering Contradiction:

ImproveportabilityVSAvoidstructural integrity

Core Design Contradiction:

Weight of moving objectVSStrength

Solution Approach 1:

The patent applies preliminary action by installing strain gauges on the flexible display panel before bending occurs. These strain gauges continuously monitor the tensile force and strain on the panel surface, enabling early detection of excessive stress that could cause cracks or permanent deformation. The system proactively identifies potential damage before it occurs, allowing users to take preventive measures.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by creating a closed-loop monitoring system where strain gauges continuously measure the strain on the flexible display panel and provide real-time data to a controller. The controller compares the measured strain against predetermined thresholds and provides feedback to the user through visual or auditory warnings. This feedback mechanism enables users to understand the current stress state of the panel and adjust their handling accordingly.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If the flexible display panel is bent repeatedly to enable flexible usage, then the display device becomes more adaptable, but the panel becomes vulnerable to permanent deformation and cracks

Engineering Contradiction:

ImproveflexibilityVSAvoiddurability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by installing strain gauges on the flexible display panel before bending occurs. These strain gauges continuously monitor the tensile force and strain on the panel surface, enabling early detection of excessive stress that could cause cracks or permanent deformation. The system proactively identifies potential damage before it occurs, allowing users to take preventive measures.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by creating a closed-loop monitoring system where strain gauges continuously measure the strain on the flexible display panel and provide real-time data to a controller. The controller compares the measured strain against predetermined thresholds and provides feedback to the user through visual or auditory warnings. This feedback mechanism enables users to understand the current stress state of the panel and adjust their handling accordingly.

Inventive Principle:

Principle #23Feedback

3Device complexity

If no strain monitoring system is installed, then the device structure remains simple, but users cannot identify bending deformation or strain tolerance limits

Engineering Contradiction:

Improvestructure simplicityVSAvoidstrain detection capability

Core Design Contradiction:

Device complexityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies mechanics substitution by replacing the need for complex mechanical inspection systems with electronic strain gauges and sensors. Instead of requiring visual inspection or complex mechanical testing to detect bending deformation, the system uses electrical sensors to measure strain on the panel surface. This substitution provides more accurate, continuous, and automated detection of deformation while maintaining relatively simple overall device structure.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enables users to identify and prevent bending deformation, reducing the risk of permanent damage and facilitating cause analysis for future improvements.

Implementation Method 1

a plurality of strain gauges is arranged on at least one surface of the flexible display panel and sense bending deformation of the flexible display panel

Methodology Applied

Scientific EffectPiezoresistive Effect: Piezoresistive Effect

Data Source

PatentUS9007226B2Flexible display device and method for sensing bending deformation

Publication Date: 2015.04.14 SAMSUNG ELECTRONICS CO LTD

AI summary

A display device and a method for controlling the same are provided, in which a flexible display panel is provided, and a plurality of strain gauges are arranged on at least one surface of the flexible display panel to sense bending deformation of the flexible display panel.