Island-Shaped Array Substrate for Stretchable Displays

Solution Overview

Problem

Existing stretchable display devices face issues with deformation, particularly at the corner positions, where excessive stretching leads to damage due to inadequate distribution of pressure during deformation.

Innovation Solution

The array substrate design incorporates island-shaped protection, display, and circuit blocks connected by flexible bridges, which absorb and distribute deformation pressure, enhancing stretch resistance through a structured arrangement of island-shaped structures and bridges, and a stretchable support base for added durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the display device is made stretchable, then the application range and flexibility are improved, but the corner positions are prone to damage due to excessive stretching and inadequate pressure distribution

Engineering Contradiction:

Improveapplication rangeVSAvoiddamage resistance at corner positions

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The display device is divided into multiple island-shaped blocks (display blocks, circuit blocks, protection blocks) connected by bridges. This segmentation allows each block to independently handle deformation, preventing stress concentration at corner positions while maintaining overall stretchability and application range.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display device are assigned different functions and structural characteristics. Protection blocks are strategically positioned at corner positions with enhanced structural design to provide localized reinforcement, while maintaining the overall flexibility and stretchability of the device through the bridge connections.

Inventive Principle:

Principle #3Local quality

2Strength

If island-shaped blocks connected by flexible bridges are used, then stretch resistance is improved by distributing deformation pressure, but the device complexity increases

Engineering Contradiction:

Improvestretch resistanceVSAvoidstructural complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The display device is divided into multiple island-shaped blocks (display blocks, circuit blocks, protection blocks) connected by bridges. This segmentation allows each block to independently handle deformation, preventing stress concentration at corner positions while maintaining overall stretchability and application range.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Flexible bridges connect the island-shaped blocks, allowing them to move independently during deformation. These flexible connections distribute deformation pressure evenly across the structure, significantly improving stretch resistance while maintaining a relatively simple overall architecture.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If multiple island-shaped protection blocks and connection bridges are implemented, then damage at edge positions is reduced, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvedamage resistance at edge positionsVSAvoidmanufacturing process simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The display device is divided into multiple island-shaped blocks (display blocks, circuit blocks, protection blocks) connected by bridges. This segmentation allows each block to independently handle deformation, preventing stress concentration at corner positions while maintaining overall stretchability and application range.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display device are assigned different functions and structural characteristics. Protection blocks are strategically positioned at corner positions with enhanced structural design to provide localized reinforcement, while maintaining the overall flexibility and stretchability of the device through the bridge connections.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11800783B2Array substrate, stretchable display device, and method for manufacturing array substrate

Publication Date: 2023.10.24 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure provides an array substrate, a stretchable display device, and a method for manufacturing an array substrate. The array substrate includes: a display area; a circuit area configured to provide an electrical signal to the display area; and a protection area including a plurality of island-shaped protection blocks, a plurality of first connection bridges and a plurality of second connection bridges, wherein each of the plurality of first connection bridges is configured to connect two adjacent island-shaped protection blocks of the plurality of island-shaped protection blocks, and the plurality of second connection bridges are configured to connect the protection area and the circuit area, and wherein the plurality of first connection bridges include a first flexible substrate, and the plurality of second connection bridges include a second flexible substrate.