PCB Cable Assembly for High-Density Video Signal Separation
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Solution Overview
Problem
The existing pig-tail cabling structure for separating video signals from high-density connectors to individual standard connectors introduces impedance mismatching, leading to signal degradation and reduced system performance, especially as video technology advances and signals become faster.
Innovation Solution
A cable assembly that includes a high-density connector, a cable for transmitting multiple video signals, and a printed circuit board (PCB) assembly to separate and route these signals under controlled impedance conditions to individual video connectors, minimizing noise and impedance mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pig-tail cabling structure is used to separate video signals from a high-density connector to individual standard connectors, then connector compatibility and signal separation are achieved, but impedance mismatching occurs leading to signal degradation
Solution Approach 1:
A PCB assembly serves as an intermediary component between the high-density connector and standard connectors. The PCB provides controlled impedance traces that mediate the signal transition, eliminating the ungrounded spans in traditional pig-tail structures while maintaining connector compatibility across different display devices.
Solution Approach 2:
The invention changes the impedance parameter along the signal path by using controlled impedance PCB traces instead of uncontrolled cable spans. This parameter change ensures consistent impedance matching from the high-density connector through the PCB to the standard connectors, preventing signal degradation while maintaining adaptability.
2Loss of energy
If high-quality low-loss cables and impedance-matched connectors are used in a pig-tail structure, then signal loss is minimized, but significant signal degradation still occurs in the ungrounded span from cable end to connector pins
Solution Approach 1:
The PCB assembly acts as an intermediary that eliminates the harmful ungrounded span entirely. By providing a controlled impedance path through the PCB traces, the signal transitions directly from the cable to the connectors without traversing an impedance-mismatched ungrounded region, thereby preventing signal degradation despite using high-quality components.
Solution Approach 2:
The invention substitutes the mechanical pig-tail cabling structure with a PCB-based electrical connection system. This replacement eliminates the physical ungrounded spans inherent in flexible cable assemblies and replaces them with rigid controlled-impedance traces on the PCB, fundamentally changing how signals are transmitted from the high-density connector to standard connectors.
3Speed
If video signals are transmitted at higher speeds to advance video technology, then display performance is improved, but signals become more susceptible to impedance mismatches and degradation
Solution Approach 1:
The invention changes the impedance parameter throughout the signal path to ensure consistent controlled impedance. By maintaining uniform impedance characteristics from the high-density connector through the PCB traces to the standard connectors, the system can support higher video signal speeds without the signals becoming susceptible to impedance mismatches and degradation.
Solution Approach 2:
The PCB assembly serves as a mediator that enables high-speed video signals to traverse the connection path reliably. The controlled impedance traces on the PCB provide a stable transmission medium that prevents signal degradation even at higher speeds, allowing video technology advances while maintaining signal integrity.
Data Source
AI summary
One embodiment of the present invention sets forth a cable assembly for separating video signals within a high-density connector to individual video connectors. The cable assembly includes a high-density connector, a cable to transmit multiple video signals, and a printed circuit board (PCB) assembly configured to separate the video signals into individual video signals. The individual video signals are routed under controlled impedance conditions provided by the PCB to individual video connectors attached to the PCB.