Flexible Cover Edge Layout for Crack-Resistant Display Quality

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Solution Overview

Problem

Conventional flexible electronic devices with organic covers suffer from poor display quality due to the limitations of organic materials in maintaining flexibility while ensuring adequate protection and image clarity.

Innovation Solution

The electronic device incorporates a flexible substrate with a cover that has a first layer retreated from the edges of different portions by varying distances, reducing stress and crack damage, and includes a supporting film to enhance display quality and reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an organic material is used as a cover to maintain flexibility, then the flexibility is improved, but the display quality deteriorates due to poor image clarity

Engineering Contradiction:

ImproveflexibilityVSAvoiddisplay quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent uses a composite cover structure consisting of an organic cover layer and an inorganic cover layer (such as glass). The inorganic layer provides high transparency and display quality, while the organic layer maintains flexibility and bendability. This composite approach resolves the contradiction by combining materials with complementary properties.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The cover is divided into multiple functional layers: an organic cover layer for flexibility and an inorganic cover layer for display quality. By segmenting the cover into distinct layers with specialized functions, the patent achieves both flexibility and high display quality simultaneously.

Inventive Principle:

Principle #1Segmentation

2Ease of manufacture

If the cover layer is retreated uniformly from all edges, then the manufacturing simplicity is improved, but the reliability deteriorates due to stress concentration and crack damage

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidcrack resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies asymmetric retreat distances of the cover layer from different edges of the flexible substrate. The first retreat distance from the first edge is different from the second retreat distance from the second edge. This asymmetric design distributes stress more evenly during bending, preventing stress concentration at uniform edges and reducing crack damage, thereby improving reliability.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

Different edges of the cover layer are retreated by different distances according to the specific stress distribution and bending characteristics of each edge. This local customization of retreat distances optimizes stress distribution across different regions, enhancing crack resistance and reliability.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250107406A1Electronic device

Publication Date: 2025.03.27 INNOLUX CORP

AI summary

The present disclosure provides an electronic device including a flexible substrate, an electronic unit, and a cover. The flexible substrate has a first portion and a second portion. The electronic unit is disposed on the flexible substrate. The cover is disposed on the electronic unit and includes a first layer. The first layer is retreated from an edge of the first portion by a first distance and retreated from an edge of the second portion by a second distance, and the second distance is different from the first distance.