Flexible Display Translation Assembly for Compact Sliding Phones

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Solution Overview

Problem

Existing portable electronic devices with clamshell or slider configurations face challenges in achieving a compact geometric form factor while providing a larger display surface area, often becoming bulky in the closed position due to the requirement of two device housings.

Innovation Solution

A flexible display integrated into a blade assembly that slides around a single device housing, transitioning between extended, retracted, and peek positions, using a translation mechanism to maintain a flat upper portion and prevent crumpling, with a rotor providing a large bending radius to protect the display.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a clamshell or slider configuration with two device housings is used, then the device can provide a larger display surface area, but the device becomes bulky in the closed position

Engineering Contradiction:

Improvedisplay surface areaVSAvoiddevice volume in closed position

Core Design Contradiction:

Area of stationary objectVSVolume of moving object

Solution Approach 1:

The patent merges the display and supporting structures into a single integrated housing rather than using two separate housings. The flexible display is mounted within one housing and can be extended beyond the housing edges, eliminating the need for a second housing while maintaining large display capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent employs a flexible display that can dynamically change its configuration between retracted and extended states. This dynamic flexibility allows the display to provide large surface area when needed while maintaining a compact form factor when retracted, resolving the contradiction between display size and compactness.

Inventive Principle:

Principle #15Dynamics

2Area of stationary object

If a flexible display is made to extend beyond the device housing edges, then the display surface area is increased, but the display may crumple or become damaged during sliding operations

Engineering Contradiction:

Improvedisplay surface areaVSAvoiddisplay integrity during sliding

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent uses a flexible display constructed from flexible substrate materials that can bend and extend without cracking. The flexible nature of the substrate allows the display to move beyond the housing edges while maintaining structural integrity during sliding operations.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent incorporates support structures and guiding mechanisms that prevent the flexible display from crumpling during extension and retraction. These protective features are built into the housing structure to cushion and guide the flexible display throughout its range of motion.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Adaptability or versatility

If a translation mechanism is used to move the flexible display, then the display can transition between extended and retracted positions, but the mechanism may introduce friction or instability

Engineering Contradiction:

Improvedisplay position flexibilityVSAvoidsliding mechanism stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent replaces complex mechanical translation mechanisms with a simpler system that utilizes the flexibility of the display substrate itself. The display is moved through controlled bending and unfolding actions rather than traditional mechanical sliders, reducing friction and mechanical failure points.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12504787B2Electronic devices with translating flexible display and corresponding methods

Publication Date: 2025.12.23 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. A low-friction dynamic bending laminate stack is positioned between the device housing and the blade assembly.