Flexible Display Sliding Mechanism With Battery Rotor Integration

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Solution Overview

Problem

Existing sliding electronic devices face challenges in efficiently utilizing space for component placement and power supply, particularly in the mechanical complexity and electrical requirements of sliding mechanisms.

Innovation Solution

The use of a rechargeable electrochemical cell as a rotor within the sliding mechanism of electronic devices, which not only facilitates the sliding action of flexible displays but also serves as a power supply, thereby optimizing space and reducing the number of components needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a traditional battery and separate rotor mechanism are used, then the device has sufficient power supply and display functionality, but the device complexity and space requirements increase

Engineering Contradiction:

Improvemechanical complexityVSAvoidpower supply reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent combines the battery and rotor mechanism into a single integrated component. The battery is positioned at the center of the rotor, and both are enclosed within a shared housing, eliminating the need for separate power supply and display mechanism components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The battery-rotor assembly serves multiple functions simultaneously: it provides power supply through the battery, enables display translation through the rotor mechanism, and acts as a structural support element within the sliding device housing.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Volume of moving object

If separate components for power supply and display mechanism are used, then each component can be optimized independently, but the overall device space efficiency decreases

Engineering Contradiction:

Improvespace utilizationVSAvoidcomponent placement efficiency

Core Design Contradiction:

Volume of moving objectVSEase of manufacture

Solution Approach 1:

The battery is nested within the rotor housing, with the battery tabs extending through the housing to make electrical connections. This nesting arrangement allows the battery to occupy the central space of the rotor assembly without interfering with the display translation mechanism.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The housing that encloses the battery also serves as the rotor housing, combining two structural elements into one. This merged housing provides both power supply containment and mechanical support for the display translation mechanism.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If traditional sliding mechanisms are used, then the flexible display can translate, but mechanical strains on the display increase

Engineering Contradiction:

Improvedisplay reliabilityVSAvoidmechanical strain on flexible display

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The battery housing and rotor housing are designed with integrated support structures that provide mechanical cushioning and support for the flexible display during translation. The housing structures are positioned to prevent excessive bending or stress on the display before strains can accumulate.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The battery-rotor assembly acts as an intermediary mechanical element between the sliding housing components, providing a smooth translation path for the flexible display while distributing mechanical stresses away from the display itself.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This solution enhances the efficiency of component placement and power supply in sliding electronic devices, reduces mechanical complexity, and prevents elevated mechanical strains on flexible displays, thereby improving reliability and usability.

Implementation Method 1

the rotor comprises a rechargeable electrochemical cell

Methodology Applied

Scientific EffectElectrochemical energy storage: Battery (electricity)

Implementation Method 2

A flexible display is coupled to the first device housing and the second device housing. The flexible display wraps around the rotor

Methodology Applied

Scientific EffectFlexible material deformation: Elasticity

Data Source

PatentUS12242302B2Sliding electronic devices with translating flexible displays and electrochemical cell rollers

Publication Date: 2025.03.04 MOTOROLA MOBILITY LLC

AI summary

An electronic device includes a flexible display. A device housing provides a translation surface for the flexible display. A rotor positioned within a curvilinear section of the flexible display rotates with translation of the flexible display across the translation surface. The rotor can be a rechargeable electrochemical cell, can be a rechargeable electrochemical cell situated within a sheath, or can be positioned within a housing defining an outer surface of the rotor to save space within the electronic device.