Foldable Display Stress Release via Cavity Bending Apparatus

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Solution Overview

Problem

Flexible display panels in foldable devices experience stress concentration during bending, leading to potential cracking or wrinkling due to inadequate stress release mechanisms.

Innovation Solution

A foldable display device design featuring a middle frame with a bending apparatus and a surface frame apparatus that forms a cavity to absorb and release stress, incorporating a surface frame bending device, slide device, and elastic device to manage panel bending without damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the flexible display panel is bent during folding, then the device achieves foldable functionality, but stress concentration occurs in the bending region causing cracking or wrinkling

Engineering Contradiction:

Improvefoldable functionalityVSAvoidpanel integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A mechanical structure comprising a middle frame bending apparatus and a surface frame bending apparatus is introduced as an intermediary between the display panel and the housing. This mechanical structure acts as a mediator that absorbs and releases stress during bending, preventing direct stress transmission to the display panel and thus avoiding cracking or wrinkling while enabling foldable functionality

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The mechanical structure is designed with bending apparatuses that create a cavity to accommodate the bent display panel in advance. This pre-configured cushioning structure ensures that when bending occurs, the panel has a predetermined space to deform into, and the stress is absorbed by the mechanical structure rather than concentrating on the panel, thereby preventing damage before it can occur

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS11314283B2Foldable display device

Publication Date: 2022.04.26 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

A foldable display device is provided, which can effectively release stress in a bending state by a combination of a surface frame bending device, a surface frame slide device, and a surface frame elastic device, thereby ensuring that the display panel can be smoothly bent without wrinkles and breakage damage.