Flexible Display Panel Strain Sensor Deformation Control

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Solution Overview

Problem

Flexible display panels face challenges in effectively detecting and adapting to various forms of deformation, such as bending, folding, and rolling, which complicates uniform display and energy management.

Innovation Solution

Incorporating resistive strain sensors on the display substrate, coupled with a signal acquisition circuit and display controller, to detect deformation, determine affected regions, and control display accordingly, generating clock signals to manage pixel units and conserve energy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the flexible display panel uses traditional display control without strain detection, then the device structure is simple, but it cannot adapt to various forms of deformation and lacks energy efficiency

Engineering Contradiction:

Improveadaptability to deformationVSAvoiddevice structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The display panel is divided into multiple regions with different strain sensors detecting deformation in specific areas. Each strain sensor corresponds to a specific region, allowing localized deformation detection and adaptive display control for different deformation scenarios

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The strain sensor system is designed to detect multiple types of deformation (bending, folding, rolling) across different regions of the display panel. The same strain sensor structure can identify various deformation forms, providing universal adaptability without requiring separate detection systems for each deformation type

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If strain sensors are arranged in the display region to detect deformation, then deformation detection precision is improved, but the display area is reduced

Engineering Contradiction:

Improvedeformation detection precisionVSAvoiddisplay area

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

Strain sensors are extracted from the display region and relocated to the non-display region. This extraction maintains deformation detection capability while preserving the entire display area, as sensors in the non-display region do not interfere with visible content

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The non-display region serves as an intermediary zone that houses strain sensors. This intermediary area transmits deformation information from the display panel to the control system without occupying display space, enabling indirect but accurate deformation detection

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the flexible display panel displays the entire screen regardless of deformation, then the display completeness is maintained, but energy consumption increases

Engineering Contradiction:

Improveenergy consumptionVSAvoiddisplay completeness

Core Design Contradiction:

Use of energy by moving objectVSLoss of information

Solution Approach 1:

The display control system dynamically adjusts the active display region based on real-time strain sensor feedback. When deformation is detected, the system dynamically determines a target display region that excludes deformed areas, optimizing energy consumption while maintaining relevant information display

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Strain sensors provide continuous feedback about panel deformation state to the control system. This feedback enables the system to intelligently adjust display parameters and region selection, reducing energy consumption by activating only the necessary non-deformed display areas

Inventive Principle:

Principle #23Feedback

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 effective detection of deformation, adaptive display control, and energy savings by identifying deformed regions and adjusting display accordingly, ensuring optimal viewing while reducing power consumption.

Implementation Method 1

The strain sensor may be a resistive stain sensor. The resistive strain sensor may include a repeatedly folded strain resistance wire along the first direction with a plurality of folding portions

Methodology Applied

Scientific EffectResistive strain sensor effect: Piezoresistive Effect

Implementation Method 2

The first resistor, the second resistor, the third resistor, and the strain sensor may form a Wheatstone bridge, and an output terminal of the voltage detector may output a voltage signal

Methodology Applied

Scientific EffectWheatstone bridge principle: Wheatstone Bridge

Data Source

PatentUS11282424B2Flexible display panel, flexible display apparatus, and display control method thereof

Publication Date: 2022.03.22 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure is related to a flexible display panel. The flexible display panel may include a display substrate, a plurality of pixel units arranged in an array on the display substrate, and at least a strain sensor on the display substrate. The strain sensor may be arranged corresponding to a region comprising at least one of the plurality of pixel units. The strain sensor may be configured to detect deformation in the region comprising at least one of the plurality of pixel units and to generate a detection signal.