Flexible Printed Circuit Cover Stabilizes Display Device Connections

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Solution Overview

Problem

The mounting state of flexible printed circuit boards in display devices is unstable due to external forces, leading to unreliable electrical coupling with printed circuit boards.

Innovation Solution

A display device design that includes a flexible printed circuit cover integrated with a shield cover, which covers the flexible printed circuit board and is formed from the same metal plate as the shield cover, providing structural support and preventing external forces from affecting the electrical connection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a flexible printed circuit board is used to supply power to the light source, then the electrical coupling between the flexible printed circuit board and the printed circuit board becomes unstable when external force is applied

Engineering Contradiction:

Improveelectrical coupling stabilityVSAvoidexternal force impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A flexible printed circuit cover is introduced as an intermediary component between the flexible printed circuit board and the external environment. This cover protects the flexible printed circuit board from external forces while maintaining electrical coupling stability, effectively mediating the interaction between the circuit board and harmful external factors.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The flexible printed circuit cover is designed as a flexible protective shell that conforms to the shape of the flexible printed circuit board. This flexible covering protects the circuit board from external forces while allowing for the necessary flexibility and movement, preventing damage and maintaining stable electrical coupling.

Inventive Principle:

Principle #30Flexible shells and thin films

2Object-affected harmful factors

If a metal shield cover is used to shield electronic components, then electromagnetic interference is reduced, but the weight of the display device increases

Engineering Contradiction:

Improveelectromagnetic interferenceVSAvoiddisplay device weight

Core Design Contradiction:

Object-affected harmful factorsVSWeight of moving object

Solution Approach 1:

The shield cover is constructed using a composite structure combining metal and resin materials. The metal portion provides electromagnetic shielding while the resin portion reduces overall weight. This composite material approach maintains electromagnetic interference protection while significantly reducing the weight compared to a purely metal shield cover.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS10712599B2Display device

Publication Date: 2020.07.14 MAGNOLIA WHITE CORP

AI summary

According to an aspect, a display device includes: a display panel; a light source; a housing that houses the display panel; a printed circuit board that is fixed to a mounting surface of the housing on an opposite side of a surface of the housing facing the display panel; a flexible printed circuit board that electrically couples the light source and the printed circuit board; and a flexible printed circuit cover that covers the flexible printed circuit board.