Segmented Rollable Display Reinforcing Structure

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Solution Overview

Problem

Existing rollable display technologies face challenges in maintaining the flexibility and durability of flexible display panels when rolled and unrolled, leading to mechanical stress, potential damage, and reduced product reliability due to friction and collision issues during state changes.

Innovation Solution

A rollable display design incorporating a flexible display panel with a reinforcing structure, a roller, a printed circuit board, and connecting members, where the reinforcing structure comprises segments with through holes and buffering members to absorb and distribute stress, and an auxiliary sheet to mitigate mechanical stress, ensuring the panel can be rolled and unrolled efficiently while minimizing damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the flexible display panel is made thin and flexible to enable rolling, then the ease of operation and adaptability improve, but the mechanical strength and durability deteriorate due to repeated rolling and unrolling causing stress and damage

Engineering Contradiction:

Improverolling capabilityVSAvoidmechanical durability

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The reinforcing structure is divided into multiple segments that can independently deform during rolling. Each segment contains through holes that allow connecting members to pass through, enabling the structure to flex while maintaining overall strength. This segmentation allows the rigid reinforcing structure to accommodate the flexible rolling motion without breaking.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Buffering members are placed at specific locations within the reinforcing structure to absorb and distribute mechanical stress before it can cause damage to the flexible display panel. These buffering members preemptively handle the stress generated during rolling and unrolling operations, protecting the panel from damage.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Strength

If a reinforcing structure is added to improve mechanical strength, then the durability improves, but the flexibility and ease of rolling deteriorate due to increased rigidity

Engineering Contradiction:

Improvemechanical durabilityVSAvoidrolling flexibility

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The reinforcing structure employs segments with varying properties - some areas have through holes for flexibility, while other areas have buffering members for strength. This local differentiation allows different parts of the structure to serve different functions: the through hole segments provide flexibility for rolling, while the buffering members provide localized reinforcement where stress occurs.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The reinforcing structure is designed to be dynamic rather than completely rigid. The segments can move relative to each other during rolling, and the buffering members compress to absorb stress. This dynamic behavior allows the structure to maintain strength while accommodating the flexible motions required for rolling operation.

Inventive Principle:

Principle #15Dynamics

3Stability of the object's composition

If connecting members are inserted through holes in segments to connect control board, then the structural integrity improves, but friction and collision damage increase during rolling motion

Engineering Contradiction:

Improvestructural integrityVSAvoidfriction and collision damage

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The buffering members act as intermediaries between the connecting members and the rigid structure. During rolling, the buffering members compress and absorb the collision forces, preventing direct contact and friction between the connecting members and the hard structure. This intermediary layer protects the connecting members from damage while maintaining structural integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10827630B2Rollable display

Publication Date: 2020.11.03 LG DISPLAY CO LTD

AI summary

A rollable display includes a flexible display panel where pixels are arranged to display an image; a reinforcing structure that is bonded to the rear side of the flexible display panel and divided into a plurality of segments; a roller that is bonded to one end of the flexible display panel and allows the flexible display panel to be rolled around the circumference; a data PCB (printed circuit board) located on the rear side of the flexible display panel; a first connecting member that connects the data PCB to the flexible display panel; a control board accommodated in the internal space of the roller; and a second connecting member that connects the control board to the data PCB, wherein each of the segments of the reinforcing structure comprises a through hole into which the second connecting member is slidably inserted.