LCD Hook Mechanism Prevents PCB Short Circuits
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices are prone to short circuits due to the release of the printed circuit board (PCB) from the source fixing boss under external impacts, compromising durability.
Innovation Solution
The implementation of a hook mechanism in the bottom chassis that includes a supporting portion and a link portion to securely fix the PCB, preventing separation from the chassis and maintaining a predetermined distance, along with an elastic hook in the middle mold to further secure the PCB, thereby enhancing durability against external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional source fixing boss is used to hold the PCB, then the structure is simple, but the PCB is released under external impacts causing short circuits
Solution Approach 1:
The hook is designed with elastic deformation capability, allowing it to dynamically absorb impact forces. The hook can bend elastically when subjected to external impacts and then return to its original position, preventing the PCB from being released while maintaining structural simplicity.
Solution Approach 2:
The elastic hook provides beforehand cushioning by being pre-designed to deform elastically under impact loads. This cushioning effect absorbs the energy of external impacts before they can cause the PCB to detach, thereby preventing short circuits without requiring complex additional components.
2Reliability
If the PCB is firmly fixed to prevent release, then durability is improved, but additional insulation components are required increasing complexity
Solution Approach 1:
The invention extracts and eliminates the need for additional insulation components by designing the hook structure itself to provide both mechanical retention and electrical insulation. The single integrated hook structure performs multiple functions, removing the requirement for separate insulation parts.
Solution Approach 2:
The elastic hook serves multiple functions simultaneously: it provides mechanical retention for the PCB, absorbs impact forces through elastic deformation, and provides electrical insulation. This multi-functionality eliminates the need for separate insulation components while maintaining durability.
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 short circuits and enhances the durability of the LCD device by firmly holding the PCB in place, reducing the risk of damage from external impacts and eliminating the need for additional insulation components.
Implementation Method 1
The hook may be separated from the middle mold so as to have elasticity
Data Source
AI summary
An LCD device includes an LCD panel for displaying images, a printed circuit board connected to one side of the LCD panel and supplying a driving signal to the LCD panel, and including a connection hole, a bottom chassis and a middle mold receiving the LCD panel, and a top chassis protecting the LCD panel and the middle mold, wherein the bottom chassis includes a hook fixing the source PCB.