Flexible Circuit Board Guide Prevents Peeling in Display Devices

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Conventional display devices face challenges in preventing peeling of flexible circuit boards due to stress concentration and weight-related issues, which affect the reliability and quality of the connection between the display panel and the circuit board.

Innovation Solution

A display device design that incorporates a panel chassis with a flexible circuit board guide projected from the rear surface to the front surface, providing a clearance and generating a frictional force to prevent peeling, while the flexible circuit board is extended along this guide to enhance stability and prevent detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the flexible circuit board is connected directly to the display panel without a guide structure, then the device complexity is reduced, but the flexible circuit board peels due to stress concentration and weight

Engineering Contradiction:
Improveconnection stabilityVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces a flexible circuit board guide as an intermediary component between the display panel and the flexible circuit board. This guide structure provides a designated path that guides and supports the flexible circuit board, preventing peeling while distributing stress along the guide rather than concentrating it at connection points. The guide acts as a mediator that resolves the conflict between maintaining simple connectivity and ensuring reliable connection stability.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If the flexible circuit board is extended without support structure, then the ease of operation is improved, but the board peels under weight stress

Engineering Contradiction:
Improvepeeling preventionVSAvoidguide structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by providing support structure (the flexible circuit board guide) only in specific critical areas where peeling occurs, rather than supporting the entire flexible circuit board uniformly. The guide is positioned at strategic locations along the board's path to prevent peeling at connection points and stress concentration areas, while leaving other areas unrestricted. This localized approach maintains reliability where needed without unnecessarily increasing overall device complexity.

Inventive Principle:
Principle #3Local quality

3Ease of manufacture

If the connector is positioned at the outer edge of the display panel, then the ease of manufacture is improved, but stress concentration causes peeling

Engineering Contradiction:
Improveconnector positioningVSAvoidconnection reliability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The flexible circuit board guide serves as an intermediary that decouples the connector positioning from the stress concentration problem. The guide provides a supported path for the flexible circuit board that extends from the connector location (which can be conveniently positioned at the outer edge for manufacturing ease) to the display panel, distributing the mechanical stress along the guided path rather than concentrating it at the edge connector. This allows manufacturers to maintain convenient connector positioning while preventing peeling through the intermediate guide structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution effectively prevents peeling of the flexible circuit board by increasing frictional force and maintaining a stable connection between the display panel and the circuit board, even under weight stress, thereby enhancing the reliability and quality of the display device.

Implementation Method 1

The flexible circuit board is provided along the flexible circuit board guide in a manner to extend on an outer side thereof... effectively prevents peeling of the flexible circuit board by increasing frictional force

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS11762228B2Display device comprising a flexible printed circuit board provided along a flexible circuit board guide
Publication Date: 2023.09.19 SHARP KK
  • US11762228B2 patent drawing
  • US11762228B2 patent drawing
  • US11762228B2 patent drawing

AI summary

A display device in the present disclosure includes: a display panel having a display on a front surface; a flexible circuit board connected to the display panel; and a panel chassis supporting a rear surface of the display panel. On an outer side of a lateral end of the display panel, the panel chassis has a flexible circuit board guide projected from the rear surface side of the display panel to the front surface side thereof. The flexible circuit board is provided along the flexible circuit board guide in a manner to extend on an outer side thereof.