Foldable Circuit Board Layout for Reliable Display Connections

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Solution Overview

Problem

Existing display devices with integrated circuit boards face challenges in flexibility and durability, particularly when bent or folded, leading to potential disconnection of electrical lines due to the presence of holes or gaps, which limits their functionality and speed of operation.

Innovation Solution

A circuit board design featuring a base substrate with defined holes and lines that are spaced and intersecting in specific configurations, allowing for foldability and preventing disconnection by ensuring line thickness is less than the minimum gap between holes, and enabling electrical continuity through intersection points.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If holes are present in the circuit board to enable folding, then flexibility is improved, but electrical disconnection may occur due to gaps between holes

Engineering Contradiction:

ImproveflexibilityVSAvoidelectrical connectivity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The circuit board is divided into multiple portions (first portion with holes for folding, second portion without holes for stable electrical connection) to simultaneously achieve flexibility and electrical reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The circuit board transitions from a two-dimensional flat structure to a three-dimensional folded structure by introducing holes in the first portion, enabling flexibility while maintaining electrical pathways through strategic line placement

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If the circuit board is made foldable with holes, then adaptability is improved, but manufacturing precision requirements increase to prevent line disconnection

Engineering Contradiction:

ImprovefoldabilityVSAvoidline positioning accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

Different portions of the circuit board have different structural qualities: the first portion has holes for flexibility while the second portion is solid for manufacturing stability, allowing each region to be optimized for its specific function

Inventive Principle:

Principle #3Local quality

3Reliability

If lines are placed close to holes to maintain electrical pathways, then electrical connectivity is improved, but disconnection risk increases due to gaps between holes

Engineering Contradiction:

Improveelectrical connectivityVSAvoidstructural stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The circuit board is segmented into a first portion with holes for folding and a second portion without holes for stable electrical connection, allowing lines to be reliably routed in the solid second portion away from hole gaps

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12443239B2Circuit board and display device including the same

Publication Date: 2025.10.14 SAMSUNG DISPLAY CO LTD

AI summary

A circuit board includes a base substrate including a first portion extending in a first direction and including a plurality of holes, and a second portion extending from the first portion in a second direction intersecting the first direction.