Polyimide Base Member Connection for Bendable Display Devices

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Solution Overview

Problem

Conventional techniques for connecting base members in display devices often result in detachment or loosening when the base member is bent, particularly in the connecting section.

Innovation Solution

A display device design featuring a non-transmissive and a transmissive display section, where the base members are made of polyimide materials with different transparency levels, and a connecting section is formed without overlapping with the bending portion, utilizing a convex-concave locking mechanism to enhance adhesion strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If base members are connected together to form a bendable structure, then the display device achieves flexibility and adaptability, but the connecting section becomes prone to detachment or loosening when bent

Engineering Contradiction:

Improveflexibility of base memberVSAvoidconnection stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The base member is divided into multiple individual base members that are connected together. Each base member can be independently formed and then joined to create a longer, flexible structure. This segmentation allows the display device to achieve flexibility while maintaining connection stability through proper joining mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connecting section is designed with an overlapping structure where one base member overlaps with another. This nesting arrangement creates a more robust connection that prevents detachment during bending, as the overlapping regions provide mechanical interlocking and distributed stress paths.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If the connecting section is positioned to avoid the bending portion, then connection stability is improved, but the base member length or area is reduced

Engineering Contradiction:

Improveconnection stabilityVSAvoidbase member length

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The connecting section is positioned in a region that does not overlap with the bending portion, utilizing spatial arrangement in multiple dimensions. This allows the connection to be located in a dimensionally optimized position that avoids the bending zone while still achieving the required base member length through the overlapping structure.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS11398610B2Display device and method of manufacturing display device

Publication Date: 2022.07.26 SHARP KK

AI summary

A display device includes a non-transmissive display section and a transmissive display section. The non-transmissive display section includes a base member including a first polyimide. The transmissive display section includes a base member including a second polyimide that has higher transparency than the first polyimide. The base member of the non-transmissive display section and the base member of the transmissive display section are connected in a connecting section. A bending portion is provided in the base member of the non-transmissive display section or the base member of the transmissive display section. The connecting section and the bending portion do not overlap each other.