Flexible Circuit Board with Bendable Notches for Display Mounting

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Solution Overview

Problem

The existing methods for mounting flexible circuit boards to display panels often result in wire breakage due to bending, and the use of adhesives to prevent this increases the outer dimensions of the display panel due to adhesive width limitations.

Innovation Solution

A flexible circuit board with a bendable portion and openings, such as notches or through holes, is designed to form a gap when bent, allowing adhesive injection into these openings to secure the board without increasing the panel's size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive is applied to prevent wire breakage after bending, then wire reliability is improved, but the outer dimension of the display panel increases

Engineering Contradiction:

Improvewire reliabilityVSAvoidouter dimension of display panel

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The flexible circuit board is segmented with notches or through-holes in the bendable portion, creating multiple discrete openings that allow adhesive to be applied in a targeted manner rather than as a continuous layer, thereby reducing the overall adhesive width and protruding amount

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adhesive application is transitioned from a two-dimensional surface coating to a three-dimensional injection through openings, allowing adhesive to be delivered directly to the gap between the flexible circuit board and array substrate, reducing the need for wide adhesive layers

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If flexible circuit board is bent to connect to display panel, then connectivity is improved, but wire breakage risk increases

Engineering Contradiction:

ImproveconnectivityVSAvoidwire integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Adhesive is injected into the gap between the flexible circuit board and array substrate before or during the bending process, providing protective cushioning to the wires in advance, so that when the board is bent, the wires are already supported and less prone to breakage

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

Adhesive serves as an intermediary substance that fills the gap and provides mechanical support to the wires during bending, mediating between the flexible circuit board and array substrate to prevent direct stress on the wires

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11183467B2Flexible circuit board, method for mounting the same, and display device

Publication Date: 2021.11.23 ORDOS YUANSHENG OPTOELECTRONICS

AI summary

A flexible circuit board, a display device and a method for mounting a flexible circuit board are disclosed. The flexible circuit board includes: a bendable portion, the flexible circuit board being bendable at the bendable portion to go into a bent state so as to be connected to a workpiece; and at least one opening in the bendable portion. In response to the bent state, a gap is formed between the bendable portion and the workpiece, and the at least one opening is in communication with the gap.