Telescopic Mobile Terminal Frame Design for Flat Outer Surface

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Solution Overview

Problem

Mobile terminals with flexible displays that extend in size face usability issues due to height differences on their outer surface, causing discomfort and potential distortion during slide movements, which affect portability and usability.

Innovation Solution

A mobile terminal design featuring frames that switch between extended and contracted states with a rear portion covering the display unit, incorporating a linear guide and a user input unit, and minimizing height differences through strategically placed surfaces and thickness variations, ensuring stable and distortion-free slide movements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the display is extended to increase screen size, then the display area is improved, but height difference occurs on the outer surface causing discomfort and potential distortion

Engineering Contradiction:
Improvedisplay areaVSAvoidouter surface flatness
Core Design Contradiction:
Area of stationary objectVSShape

Solution Approach 1:

The second frame is nested within the first frame in a telescopic configuration, allowing the display to extend and contract while maintaining a relatively flat outer surface. The nested structure enables the display area to vary without creating significant height differences on the outer surface, as the extending frame is contained within the outer frame boundaries.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent introduces a third dimension (depth/extension) to the frame structure to enable display area variation while maintaining outer surface flatness. By extending the second frame in the depth direction relative to the first frame, the display can change size without affecting the outer surface profile in the primary viewing dimensions.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Device complexity

If the frame structure is simplified to improve portability, then device complexity is reduced, but stability during slide movement deteriorates

Engineering Contradiction:
Improveframe structure complexityVSAvoidslide movement stability
Core Design Contradiction:
Device complexityVSStability of the object's composition

Solution Approach 1:

The frame structure employs a dynamic telescopic mechanism where the second frame can slide relative to the first frame along guide rails. This dynamic structure allows the display to transition between extended and contracted states while maintaining stability during movement through the guide rail constraints, rather than requiring a fixed complex structure.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The frame is segmented into a first frame and a second frame that can move independently relative to each other. This segmentation allows for a simpler overall structure where each frame portion is relatively simple, yet the combination provides stable slide movement through the guide rail mechanism.

Inventive Principle:
Principle #1Segmentation

3Adaptability or versatility

If the frame extends to provide larger display area, then adaptability is improved, but volume increases affecting portability

Engineering Contradiction:
Improvedisplay size adaptabilityVSAvoiddevice volume
Core Design Contradiction:
Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The display area is made dynamic through the telescopic frame mechanism, allowing the device to adapt between different display sizes. The volume remains relatively compact because the second frame slides within the first frame rather than requiring additional external space, enabling display adaptability without significant volume increase.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS11588224B2Mobile terminal
Publication Date: 2023.02.21 LG ELECTRONICS INC
  • US11588224B2 patent drawing
  • US11588224B2 patent drawing
  • US11588224B2 patent drawing

AI summary

A mobile terminal including a first frame, and a second frame capable of switching a state thereof to an extended state by moving in a first direction from the first frame, and to a contracted state by sliding in a second direction opposite to the first direction, wherein the second frame includes a rear portion for at least partially covering a rear surface of the first frame, wherein the first frame includes a first rear surface exposed rearwardly in the contracted state, a second rear surface located frontwardly of the rear portion and not exposed to the outside in the contracted state, wherein at least a portion of the second rear surface is exposed rearwardly in the extended state, and a third rear surface covered by the rear portion in the contracted state and in the extended state.