Back Light Module Bezel Through Hole Pin Connection
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Solution Overview
Problem
The assembly process of display devices with conventional back light modules is complex and time-consuming due to the need to bend and connect circuit boards, which can lead to breakage and electrical disconnections, resulting in abnormal device displays.
Innovation Solution
A back light module design featuring a bezel with through holes allows conductive pins on the circuit boards to be directly connected via these holes, eliminating the need for external conductive wires and simplifying the assembly process by exposing conductive pin sets from the bezel's back surface, thereby ensuring stable electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit board is bent and connected to the connector on the driving circuit board, then the light source assembly can be electrically connected to the driving circuit board, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The invention divides the electrical connection path into two separate segments: conductive pins on the circuit board and corresponding conductive pins on the driving circuit board, connected through through-holes in the bezel. This segmentation eliminates the need for bending and connector assembly, simplifying the overall assembly process while maintaining reliable electrical connection.
2Ease of manufacture
If the circuit board is bent repeatedly during assembly, then the circuit board can be connected to the driving circuit board, but the circuit board may break or cause nibs against other elements
Solution Approach 1:
Instead of bending the circuit board to achieve connection, the invention inverts the approach by having the circuit board extend straight through the bezel with conductive pins making contact on the other side. This eliminates the harmful bending action entirely, preventing circuit board breakage and nibs against other elements.
3Reliability
If the circuit board is bent to connect to the connector, then electrical connection can be achieved, but the connection may become abnormal due to breakage or nibs
Solution Approach 1:
The circuit board is designed with conductive pins that extend through the bezel in a predetermined straight path, with the driving circuit board positioned to receive these pins. This preliminary arrangement of connection elements eliminates the need for time-consuming bending and connector attachment operations, reducing assembly time while ensuring reliable electrical connection.
Data Source
AI summary
A back light module includes a bezel, a light source assembly and a first circuit board. The bezel has a carrier surface, a first back surface opposite to the first back surface, and a through hole passing through the bezel from the carrier surface to the first back surface. The light source assembly is disposed on the carrier surface, and the first circuit board is disposed on the first back surface. The light source assembly includes a second circuit board and a plurality of light emitting elements. The second circuit board is electrically connected to the first circuit board by its conductive pin set via the through hole. Since the light source assembly is electrically connected to the first circuit board by the conductive pin set, the assembly process is simplified and the cost is decreased. A display device using the back light module is also provided.