Rollable Flexible Display Panel Tilt Sensing and Winding Control

Solution Overview

Problem

Existing display devices with flexible display panels experience variations and tilting issues when wound around or unwound from a roller, lacking effective detection and adjustment mechanisms.

Innovation Solution

A display device incorporating a flexible display panel, a module cover, a roller, a sensor, and a controller to detect and adjust movements and tilting of the display panel during winding and unwinding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a flexible display panel is wound around or unwound from a roller, then the display device can be folded or rolled for portability, but movement variations and tilting occur during the winding and unwinding process

Engineering Contradiction:

ImprovefoldabilityVSAvoidmovement stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

A sensor detects the position and tilting of the display panel during winding and unwinding operations, providing real-time feedback to a controller. The controller adjusts motor output based on this feedback to minimize movement variations and maintain stable display panel positioning throughout the folding and unfolding cycle.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces pure mechanical winding mechanisms with an automated control system that uses sensors and motors. Instead of relying solely on mechanical friction and tension to control panel movement, the system uses electronic sensing and motor control to actively compensate for tilting and movement variations during rolling operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If a flexible display panel is wound around or unwound from a roller, then the display device can be folded or rolled for portability, but tilting of the display panel to the left or right occurs

Engineering Contradiction:

ImproveportabilityVSAvoidtilting detection accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

A sensor detects the position and tilting of the display panel during winding and unwinding operations, providing real-time feedback to a controller. The controller adjusts motor output based on this feedback to minimize movement variations and maintain stable display panel positioning throughout the folding and unfolding cycle.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The sensor acts as an intermediary between the mechanical winding system and the control system. It converts physical tilting and position information into electrical signals that the controller can process, enabling precise detection and correction of panel orientation during rolling operations.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Duration of action of moving object

If a flexible display panel is repeatedly wound around or unwound from a roller, then the display device can be folded multiple times, but variations in movement accumulate with each cycle

Engineering Contradiction:

Improverepeated folding cyclesVSAvoidmovement consistency

Core Design Contradiction:

Duration of action of moving objectVSStability of the object's composition

Solution Approach 1:

A sensor detects the position and tilting of the display panel during winding and unwinding operations, providing real-time feedback to a controller. The controller adjusts motor output based on this feedback to minimize movement variations and maintain stable display panel positioning throughout the folding and unfolding cycle.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The control system continuously monitors and self-adjusts the winding process to compensate for accumulated movement variations. By using real-time sensor data to modify motor control parameters, the system automatically corrects drift and inconsistency that would otherwise accumulate over repeated folding and unfolding cycles.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12488709B2Display device with flexible display panel

Publication Date: 2025.12.02 LG ELECTRONICS INC

AI summary

A display device is disclosed. The display device according to the present disclosure may include: a flexible display panel; a module cover which is disposed at a rear of the display panel; a roller on or from which the display panel and the module cover are wound or unwound; a sensor which is disposed adjacent to the display panel and the module cover so as to sense movements of the display panel and the module cover; and a controller which controls a degree of winding or unwinding of the display panel and the module cover on or from the roller based on information on the movements acquired by the sensor.