Flexible Display Blade Assembly for Crumple-Resistant Sliding

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Solution Overview

Problem

Existing portable electronic devices with flexible displays face challenges in achieving a compact geometric form factor while providing a larger display surface area without bulkiness, particularly in closed positions, and issues like crumpling and pillowing of the flexible display during sliding operations.

Innovation Solution

A flexible display is integrated into a blade assembly that slides around a single device housing, using a translation mechanism with a tensioner to maintain a flat geometric orientation and prevent crumpling, employing mechanical fasteners and springs to apply a continuous force, ensuring smooth sliding between extended, retracted, and peek positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If a flexible display is integrated into a blade assembly that slides around a single device housing, then the display surface area is enlarged while maintaining a compact form factor, but the flexible display is prone to crumpling and pillowing during sliding operations

Engineering Contradiction:

Improvedisplay surface areaVSAvoidflat geometric orientation

Core Design Contradiction:

Area of moving objectVSStability of the object's composition

Solution Approach 1:

The patent employs a flexible substrate as the base layer that allows the display to bend and slide while maintaining structural integrity. This flexible shell approach enables the display to conform to the blade assembly's movement without crumpling, directly addressing the stability issue while preserving the enlarged display surface area.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent incorporates a tensioner mechanism that applies continuous tension to the flexible display before and during sliding operations. This preliminary action of pre-tensioning prevents the display from developing wrinkles or pillows during movement, maintaining its flat geometric orientation throughout the sliding transition.

Inventive Principle:

Principle #10Preliminary action

2Stability of the object's composition

If mechanical fasteners and springs are used to apply continuous force and prevent crumpling, then the flat geometric orientation is maintained, but the device complexity increases

Engineering Contradiction:

Improveflat geometric orientationVSAvoidtranslation mechanism

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The tensioner mechanism is designed to automatically maintain tension on the flexible display through its own mechanical configuration, such as using spring-loaded elements that self-regulate. This self-service approach reduces the need for additional control systems or complex actuation mechanisms, thereby limiting the increase in device complexity while still maintaining flat geometric orientation.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent integrates the tensioner and translation mechanism into a unified assembly where the components work together as a single system. By merging the force-application mechanism with the sliding mechanism, the patent reduces overall device complexity compared to having separate systems for tensioning and translating the display.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If the blade assembly slides around the device housing, then the display can transition between extended, retracted, and peek positions, but the operation becomes less reliable due to potential crumpling

Engineering Contradiction:

Improvesliding positionsVSAvoidsmooth sliding operation

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The flexible substrate acts as a protective shell that prevents the display from crumpling during sliding operations. This flexible protection layer ensures reliable operation by maintaining the display's structural integrity as it transitions between extended, retracted, and peek positions, directly improving operational reliability.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The tensioner applies continuous tension beforehand and throughout the sliding operation, preventing crumpling from occurring in the first place. This preliminary and continuous action ensures that the display remains in a stable, wrinkle-free state during all transitions, thereby maintaining reliable operation across all sliding positions.

Inventive Principle:

Principle #10Preliminary action

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

The solution provides a compact electronic device with a larger display surface area, preventing crumpling and pillowing of the flexible display, ensuring smooth and reliable operation of the flexible display during sliding transitions.

Implementation Method 1

employing mechanical fasteners and springs to apply a continuous force

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

springs to apply a continuous force

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12422893B2Electronic devices with translating flexible display and corresponding methods

Publication Date: 2025.09.23 MOTOROLA MOBILITY LLC

AI summary

An electronic device includes a flexible display and a device housing that defines a translation surface for the flexible display. A blade assembly is positioned between the flexible display and the translation surface. A rotor is positioned within a curvilinear section of the blade assembly and flexible display. A translation mechanism translates the blade assembly and flexible display between an extended position, a retracted position, and a peek position revealing an image capture device.