Foldable Display Textile Substrate Segmentation

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Solution Overview

Problem

Conventional foldable displays face challenges in achieving a balance between durability and flexibility, with traditional glass substrates providing excellent durability but poor folding characteristics, and plastic substrates offering good folding but reduced durability.

Innovation Solution

A foldable display design incorporating a base substrate with a matrix and implanted textile, featuring a flexible area and a rigid area, where the textile's yarn density and weaving differ between the two, and an image display device with a sealing member, enhancing durability and flexibility by reducing folding stress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a glass substrate is used, then durability is improved, but flexibility and folding characteristics deteriorate

Engineering Contradiction:

ImprovedurabilityVSAvoidflexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The substrate is divided into a rigid area and a flexible area, with the flexible area having reduced textile density to enable folding while the rigid area maintains structural strength for durability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The textile density is varied locally across the substrate - higher density in the rigid area for durability and lower density in the flexible area for flexibility, allowing each region to optimize its properties

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If a plastic substrate is used, then flexibility and folding characteristics are improved, but durability deteriorates

Engineering Contradiction:

ImproveflexibilityVSAvoiddurability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The substrate is segmented into rigid and flexible areas, allowing the plastic substrate to provide flexibility where needed while maintaining durability in the rigid area through higher textile density

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The substrate combines plastic material with textile reinforcement, creating a composite structure that achieves both flexibility and durability through the synergistic properties of the materials

Inventive Principle:

Principle #40Composite materials

3Reliability

If textile density is increased, then durability is improved, but flexibility deteriorates

Engineering Contradiction:

ImprovedurabilityVSAvoidflexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The textile density is optimized locally - higher density in the rigid area for durability and lower density in the flexible area for flexibility, resolving the contradiction through spatial variation

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The textile density parameter is changed across different regions of the substrate, transitioning from high density in the rigid area to low density in the flexible area to achieve both durability and flexibility

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9639121B2Foldable display

Publication Date: 2017.05.02 SAMSUNG DISPLAY CO LTD

AI summary

A foldable display is disclosed. In one aspect, the foldable display includes a base substrate including a flexible area and a rigid area disposed at one or more sides of the flexible area. The foldable display also includes an image display device provided on the base substrate. The base substrate includes a matrix and a textile implanted in the matrix. The textile includes a flexible part corresponding to the flexible area and a rigid part corresponding to the rigid area. The rigid part is weaved differently from the flexible part.