Backlight Unit Connector Through Hole Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The assembly of backlight units in liquid crystal displays is complicated by the internal positioning of wires and connectors, leading to reduced assembly performance and increased costs, as well as difficulties in achieving a narrow bezel design due to the space occupied by the light source PCB and connectors.
Innovation Solution
A backlight unit design featuring a protrusion on the light source PCB that passes through a through hole in the bottom cover, allowing the connector to be exposed externally for easier connection to the light source driver, simplifying the wiring process and reducing the bezel width by eliminating the need for internal connector mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connector is positioned inside the liquid crystal module and the wire is fastened to the connector in the initial assembly stage, then the connector is protected from external damage, but the assembly performance is reduced and assembly cost increases due to difficulty in arranging the wire
Solution Approach 1:
The connector is pre-positioned on the light source PCB at the initial assembly stage, but the wire connection is deferred until the light source PCB is mounted on the back cover. This preliminary positioning allows the connector to be protected during assembly while enabling easy wire arrangement at the optimal timing, resolving the contradiction between protection and assembly efficiency
Solution Approach 2:
The design moves the connector from a fully internal position to a position that extends through the back cover to the external side. This dimensional change allows the connector to remain protected within the module structure while enabling external access for wire connection, eliminating the need to navigate wires through tight internal spaces during assembly
2Volume of moving object
If the connector is positioned inside the liquid crystal module, then the module structure is compact, but it is impossible for the user to confirm whether the wire is well fastened to the connector after assembly
Solution Approach 1:
The connector is designed to extend from the internal PCB through the back cover to the external side, creating a multi-dimensional presence. This allows the connector to maintain compact integration within the module volume while simultaneously providing external accessibility for visual confirmation and connection verification, resolving the contradiction between compactness and ease of operation
3Reliability
If the light source PCB occupies additional area for connector mounting, then the connector can be securely mounted, but the bezel width is forced to increase
Solution Approach 1:
The connector is oriented to extend in the thickness direction of the back cover rather than occupying lateral space on the PCB. This dimensional reorientation allows the connector to be securely mounted on the PCB while extending through the back cover to the external side, eliminating the need for additional lateral space that would increase bezel width, thus resolving the contradiction between mounting security and bezel width
Data Source
AI summary
A backlight unit and a liquid crystal display using the same are disclosed. The backlight unit includes a plurality of light sources generating light, a light source printed circuit board (PCB) on which the plurality of light sources are mounted, a protrusion that protrudes from one side of the light source PCB and is fastened to a connector used to supply a driving power to the plurality of light sources, and a bottom cover that receives the light source PCB and has a through hole through which the protrusion passes. The connector is exposed to the outside through the through hole.