Curved Display Substrate Support Member Bonding

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Solution Overview

Problem

Thin film substrates used in curved display devices are prone to damage due to reduced mechanical strength, especially when subjected to stress from flexible printed circuit boards and unintended impacts, as they are thinned to follow curved surfaces.

Innovation Solution

A support member is bonded to the second surface of the substrate, facing the terminal portion, and the covering member is bonded to both the polarizing plate and the support member, increasing the mechanical strength of the substrate by providing additional support and preventing bending or damage from impacts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the substrate is thinned to easily follow the curved surface of the covering member, then the ease of manufacture and adaptability to curved surfaces is improved, but the mechanical strength of the substrate decreases, making it easily damaged by impact or stress

Engineering Contradiction:

Improveease of following curved surfaceVSAvoidmechanical strength of substrate

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The patent creates a composite structure by bonding a support member to the substrate. This composite construction combines the thin substrate (which can follow curved surfaces) with the stronger support member (which provides mechanical strength), thereby resolving the contradiction between ease of manufacture and mechanical strength.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent divides the protective structure into separate functional components: the thin substrate for following the curved surface and the separate support member for providing mechanical strength. This segmentation allows each component to optimize its specific function while working together as a system.

Inventive Principle:

Principle #1Segmentation

2Ease of manufacture

If a gap corresponding to the thickness of the polarizing plate is formed between the terminal portion and the covering member, then the polarizing plate can be bonded to the substrate, but the thin substrate is located alone outside the polarizing plate, creating vulnerability to damage from FPC pulling stress

Engineering Contradiction:

Improvebonding of polarizing plateVSAvoidresistance to damage from FPC stress

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The support member acts as an intermediary element that bridges the gap created by the polarizing plate thickness. It provides continuous support to the substrate in the terminal portion region, preventing the substrate from being vulnerable to FPC pulling stress while allowing the polarizing plate to be properly bonded.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The support member is bonded to the substrate in advance, before the FPC is connected and before any pulling stress occurs. This preliminary support structure is already in place to prevent damage when the FPC is subsequently pulled during operation or installation.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9851592B2Display device

Publication Date: 2017.12.26 MAGNOLIA WHITE CORP

AI summary

According to an aspect, a display device includes: a substrate including a pixel portion and a terminal portion that are provided on a first surface of the substrate, a flexible printed circuit board that is bonded to the terminal portion, a polarizing plate that is bonded to a region facing the pixel portion in a second surface opposite to the first surface of the substrate, a support member that is bonded to a region facing the terminal portion in the second surface, and a covering member that is bonded to the polarizing plate and the support member.