PCB Recessed Insulating Layer for Flexible Cable Connection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing number of output signals from control printed circuit boards in LCD devices leads to deteriorated display quality due to defects in connectors connected to flexible cables, which are exacerbated by the decreasing size of gaps between conductive lines.
Innovation Solution
A printed circuit board assembly with recessed insulating layers exposing conductive lines, allowing flexible cables with corresponding conductive lines to be directly inserted and connected without additional connectors, reducing the risk of defects and thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connectors are used to connect flexible cables to printed circuit boards, then electrical connection is achieved, but display quality deteriorates due to connector defects
Solution Approach 1:
The patent removes the connector component entirely from the system. Instead of using a connector to bridge the flexible cable and printed circuit board, the flexible cable is directly inserted into a recess formed on the PCB, eliminating the interface that causes defects and display quality deterioration.
Solution Approach 2:
The flexible cable is nested within the recess structure of the PCB. The recess provides a housing that accommodates the flexible cable, creating a integrated structure where the cable is embedded rather than externally connected, thereby eliminating connector-related defects.
2Reliability
If additional connectors are used to ensure electrical connection, then connection reliability improves, but board thickness increases
Solution Approach 1:
The connector component is extracted and removed from the assembly. The recess structure integrates the connection function directly into the PCB, eliminating the need for additional connector layers and reducing overall board thickness.
3Adaptability or versatility
If the number of conductive lines in flexible cable increases to support more output signals, then functionality improves, but gap size between conductive lines decreases leading to connector defects
Solution Approach 1:
By removing the connector, the patent eliminates the component that is most sensitive to small gap variations. The direct insertion into the recess provides a more robust connection that is less affected by manufacturing tolerances of narrow gaps between conductive lines.
Data Source
AI summary
A printed circuit board assembly includes a printed circuit board including a plurality of first conductive lines insulated from each other and an insulating layer disposed on the first conductive lines. The insulating layer having a recess disposed at a side surface of the insulating layer. The recess exposes the first conductive lines. The printed circuit board assembly further includes a flexible cable including a plurality of second conductive lines corresponding to the first conductive lines. The flexible cable is disposed in the recess.