Flexible Display Bending Sensing via Conductive Particles

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Solution Overview

Problem

Flexible display devices lack the ability to sense and adapt to their bending degree, limiting their operational flexibility and application scenarios.

Innovation Solution

A flexible display module with a sensing module that includes conductive particles and films, capacitive touch substrates, optical fiber sensors, and thin film pressure sensors to determine the degree of bending, coupled with a control module to trigger corresponding operations based on the sensed bending.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If flexible display devices are made deformable and bendable, then adaptability and versatility are improved, but the ability to sense and adapt to bending degree is lost

Engineering Contradiction:

Improvebending adaptabilityVSAvoidbending degree sensing

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent combines the flexible display structure with bending sensing functionality by integrating conductive particles between stacked flexible substrates. The sensing layer is merged with the display structure itself, allowing the display to both bend and sense its bending degree simultaneously without requiring separate sensing components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Conductive particles serve as intermediaries between the flexible substrates. These particles maintain electrical connection during bending and enable the sensing of bending degree through changes in electrical characteristics, bridging the mechanical deformation and electrical sensing functions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If sensing modules are added to flexible display panels, then bending degree detection capability is improved, but device complexity increases

Engineering Contradiction:

Improvebending degree detectionVSAvoidmodule structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The sensing module is segmented into multiple independent flexible substrates stacked together, with conductive particles between them. This segmentation allows each substrate to remain simple and flexible while the combination provides bending sensing capability, reducing the complexity of individual components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The flexible substrates serve dual functions: as structural support for the display and as sensing elements for detecting bending degree. The conductive particles simultaneously maintain electrical connectivity and enable bending sensing, reducing the need for separate dedicated sensing components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 the flexible display module to perform adaptive operations such as switching display modes or turning off network functions based on bending, enhancing its practicality and application range.

Implementation Method 1

conductive particles between the first line film and the second line film

Methodology Applied

Scientific EffectConductive particles: Conduction (electrical)

Implementation Method 2

an optical fiber bending displacement sensor disposed on the flexible display panel and an optical signal processing circuit. The optical signal processing circuit is used for determining the degree of bending of the flexible display panel based on light propagation parameters sensed by the optical fiber bending displacement sensor

Methodology Applied

Scientific EffectOptical fiber bending: Optical Fibre

Implementation Method 3

a thin film pressure sensor provided on the flexible display panel and a pressure signal processing circuit electrically connected to the thin film pressure sensor. The pressure signal processing circuit is used for determining the degree of bending of the flexible display panel based on a pressure change sensed by the thin film pressure sensor

Methodology Applied

Scientific EffectPressure sensing: Piezoresistive Effect

Implementation Method 4

the sensing module comprises a capacitive touch substrate on a display surface of the flexible display panel and a second scanning circuit connected to the capacitive touch substrate, the second scanning circuit is used for determining the degree of bending of the flexible display panel based on a capacitance in the capacitive touch substrate

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS10783852B2Flexible display module and manufacturing method thereof

Publication Date: 2020.09.22 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure provides a flexible display module and a manufacturing method thereof. The flexible display module comprises a flexible display panel and a sensing module arranged on the flexible display panel. The sensing module is used for sensing a degree of bending of said flexible display panel. In this way, the flexible display module can perform corresponding operations according to the sensed degree of bending of the display panel, as a result, practicability of the flexible display module can be enhanced, and the operation modes and application scenarios of the flexible screen can be expanded.