Flexible Display Foreign-Blocking Structure With Variable Gap

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Solution Overview

Problem

Existing flexible electronic devices face issues with foreign object prevention mechanisms that cause friction and surface damage during the retraction or extraction of flexible displays, leading to potential scratches or damage.

Innovation Solution

An electronic device with a foreign object prevention structure that includes a variable thickness foreign substance blocking portion controlled by voltage, spaced apart from the flexible display to prevent friction and damage during retraction or extraction operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If physical means such as a seal, sweeper, or scraper are used as foreign object prevention means, then foreign objects can be blocked and discharged, but friction occurs during retraction or extraction operation and surface damage may be caused

Engineering Contradiction:

Improveforeign object preventionVSAvoidfriction and surface damage

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the mechanical contact-based foreign object prevention system (seals, sweepers, scrapers) with an electromagnetic field-based system. A magnet is disposed near the flexible display, and a magnetic sheet is attached to the rear surface of the flexible display. The magnetic sheet is attracted to the magnet, forming a gap between the flexible display and the housing that prevents foreign objects from entering while avoiding direct mechanical contact that causes friction and surface damage.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic sheet as an intermediary element between the housing and the flexible display. This magnetic sheet is attracted to the magnet and maintains a controlled gap, serving as a mediator that prevents foreign object intrusion without requiring direct mechanical contact between the flexible display and the housing, thereby eliminating friction-induced surface damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If a foreign object prevention structure contacts the flexible display surface, then foreign objects can be blocked, but friction causes scratches or damage to the flexible display

Engineering Contradiction:

Improveforeign object blockingVSAvoidflexible display surface integrity

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent replaces mechanical contact-based foreign object blocking with an electromagnetic field-based approach. A magnet and magnetic sheet create a magnetic attraction force that maintains a gap between the flexible display and the housing, preventing foreign objects from entering while eliminating mechanical contact that would cause scratches or surface damage.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent converts the magnetic attraction force, which could potentially cause the magnetic sheet to stick to the housing, into a beneficial force that maintains a controlled gap. By positioning the magnet and magnetic sheet appropriately, the magnetic force creates and sustains the spacing needed to prevent foreign object intrusion while avoiding contact with the flexible display surface.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Prevents scratches and damage to the flexible display by minimizing friction through a voltage-controlled, spaced-apart foreign object prevention structure.

Implementation Method 1

the foreign substance blocking portion is configured to deform in response to a voltage applied thereto

Methodology Applied

Scientific EffectElectroactive polymer deformation: Electroactive Polymer

Data Source

PatentUS20260006732A1Electronic apparatus comprising flexible display

Publication Date: 2026.01.01 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is provided. The electronic device includes a housing assembly including a first housing and a second housing slidably coupled to the first housing, a flexible display disposed on the first housing and the second housing, and configured so that a portion the flexible display is bent to be retracted into or extracted from an interior of the housing assembly according to movement of the second housing, a foreign substance blocking portion disposed between the housing assembly and the flexible display, and configured to have a variable thickness based on an applied voltage, memory storing instructions, and at least one processor communicatively coupled to the flexible display, the foreign substance blocking portion, and the memory, wherein the instructions, when executed by the at least one processor individually or collectively, cause the electronic device to control an amount of voltage applied to the foreign substance blocking portion according to movement of the second housing.