LCD Backlight PCB Through-Hole Connection for Easier Assembly
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Solution Overview
Problem
The assembly process of liquid crystal display (LCD) devices with LED backlight units is complicated due to the need for wires to extend from the rear side and pass through the lateral side of the cover, making it difficult to manage and increasing the risk of wire detachment, leading to manufacturing challenges and higher costs.
Innovation Solution
Incorporating a through hole in the cover to allow direct electrical connection between the first and second printed circuit boards (PCBs) via connectors or contact patterns, reducing the length and exposure of the power cable, and eliminating the need for a separate power cable by using integrated connection terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wire is used to electrically connect the first PCB and second PCB by extending from the rear side and passing through the lateral side of the lower cover, then electrical connection is achieved, but the assembly process becomes complicated and the wire management becomes difficult
Solution Approach 1:
The wire is extracted from the problematic lateral side routing path and repositioned to pass through the rear side of the lower cover instead. This extraction from the complex assembly path eliminates the need for lateral side penetration and simplifies the assembly process while maintaining electrical connection reliability
Solution Approach 2:
The lower cover itself serves as an intermediary structure with a specifically positioned through-hole that facilitates direct rear-side passage of the wire. This intermediary structure provides a predetermined pathway that simplifies wire installation and improves assembly ease without compromising connection reliability
2Reliability
If a wire is exposed and extends through the lateral side of the lower cover, then electrical connection is achieved, but the wire may be detached during subsequent processes and is not easy to manage
Solution Approach 1:
The through-hole is pre-positioned in the lower cover at a location that allows the wire to pass through the rear side before any subsequent assembly steps. This preliminary positioning prevents wire exposure and detachment risks during later manufacturing processes, making wire management easier while maintaining connection stability
Solution Approach 2:
Instead of having the wire enter from the front/lateral side and exit elsewhere, the wire routing is inverted to enter and exit through the rear side of the lower cover. This inversion places the wire in a more manageable position that reduces detachment risk and simplifies subsequent assembly operations
Data Source
AI summary
A first printed circuit board is disposed on a first side of the cover. A second printed circuit board is disposed on a second side of the cover. A first connector and a second connector are disposed on the first and second printed circuit boards, respectively. A through hole is formed in a region of the cover that corresponds to the first connector. The first and second connectors are electrically connected to each other through the through hole.