Flexible Wiring Substrate Shielding for Display Panel Connection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible printed circuits in display devices are prone to breakage and corrosion due to folding and pressure, which compromises the reliability of the conductive layers.
Innovation Solution
A display device design featuring a wiring substrate with an electromagnetic shielding layer and an insulating cover that covers the conductive layer, preventing exposure and corrosion, and includes a flexible substrate with a concavity to reduce stress during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible printed circuit is folded to connect to the display panel, then the connection between the display panel and the electronic device body is achieved, but the conductive layer may contact the corner portion of the display panel causing breakage
Solution Approach 1:
An insulating protective layer is introduced as an intermediary between the conductive layer and the corner portion of the display panel. This protective layer prevents direct contact and potential breakage of the conductive layer while allowing the flexible printed circuit to maintain its folding connection capability.
Solution Approach 2:
The insulating protective layer is formed in advance to cover and protect the conductive layer before the folding and connection process occurs. This pre-protection ensures that the conductive layer is shielded from mechanical stress and potential breakage during subsequent assembly operations.
2Ease of manufacture
If the flexible printed circuit is pressed during connection to the display panel, then the electrical connection is established, but the conductive layer may break due to applied pressure
Solution Approach 1:
The insulating protective layer serves as a mediator that distributes the applied pressure during the connection process. By placing this protective layer between the pressing force and the conductive layer, the pressure is spread out, preventing localized stress concentration that could cause conductive layer breakage.
3Ease of operation
If the conductive layer is exposed on the flexible printed circuit, then the electrical connection is accessible, but corrosion of the conductive layer may occur
Solution Approach 1:
The harmful exposure of the conductive layer to the environment is removed by covering it with the insulating protective layer. This extraction of the conductive layer from the corrosive environment while maintaining its electrical function through the protective covering prevents corrosion.
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 enhances the reliability of the display device by preventing breakage and corrosion of the conductive layers, ensuring consistent performance and durability.
Implementation Method 1
an electromagnetic shielding layer disposed on the second surface and covering at least a part of the IC chip
Implementation Method 2
an insulating cover covering the first conductive layer
Data Source
AI summary
According to one embodiment, a display device includes a display panel including a first insulating substrate, a first electrode disposed above the first insulating substrate, an IC chip electrically connected to the first electrode, a first terminal electrically connected to the IC chip, and a wiring substrate including a base including a first surface and a second surface on a side opposite to the first surface, a second terminal which is disposed on the first surface and is electrically connected to the first terminal, and an electromagnetic shielding layer which is disposed on the second surface and covers at least a part of the IC chip.