Splicing Lamp Port Detection Using Bidirectional Pull Modes
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Solution Overview
Problem
Traditional splicing lamp detection methods are inefficient and costly, often requiring multiple ports for device detection, which can lead to high current levels and potential device damage, and are slow when confirming the existence of lower-level devices.
Innovation Solution
A detection method where control chips configure ports in a strong pull-down mode to identify upstream and downstream connections, using a weak pull-up mode to confirm downstream ports, and output high levels to drive downstream chips for detection, reducing the need for multiple ports and interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional detection methods use multiple ports for device detection, then detection reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple port detection functions into a single port by implementing bidirectional communication capability. The same port alternates between input and output modes to detect both upstream and downstream devices, eliminating the need for separate dedicated ports for each detection direction.
Solution Approach 2:
Each communication port is designed to serve multiple functions: it can detect upstream devices when configured as an input port, detect downstream devices when configured as an output port, and transmit data in both directions. This multi-functional design reduces the total number of ports required.
2Measurement precision
If traditional detection methods wait for response from lower-level device, then detection accuracy is improved, but detection speed decreases
Solution Approach 1:
The system performs preliminary detection by configuring ports in specific input/output modes before actual data transmission. This preliminary configuration allows the system to quickly identify device connectivity and directionality without waiting for full communication protocols to complete.
Solution Approach 2:
The detection process uses periodic mode switching between input and output configurations. The port alternates between detection modes in a structured sequence, allowing rapid iteration through detection states to quickly confirm device presence and communication direction.
3Adaptability or versatility
If each control chip uses two ports for detection, then detection capability is improved, but chip cost increases sharply
Solution Approach 1:
The patent merges the functions of what would traditionally require two separate ports into a single bidirectional port. By combining upstream detection, downstream detection, and data transmission capabilities into one port, the hardware requirements are reduced, lowering chip manufacturing costs.
Solution Approach 2:
The port configuration is made dynamic rather than static. The same physical port changes its functional configuration (input vs. output mode) based on the detection phase and communication direction required, allowing one physical port to perform the work of multiple static ports.
4Reliability
If current is limited to improve device safety, then device reliability is improved, but detection complexity increases
Solution Approach 1:
The system implements protective measures in advance by configuring ports in high-impedance states during mode transitions and using controlled voltage levels. This prevents excessive current from flowing during the detection process, protecting devices before potential damage could occur.
Solution Approach 2:
The detection method changes electrical parameters (voltage levels, impedance states, current limits) dynamically during the detection process. By adjusting these parameters appropriately during mode switching and detection phases, the system maintains device safety without requiring complex external protection circuits.
Data Source
AI summary
A detection executing method comprises: a current control chip initially configuring all ports in a strong pull-down mode, so as to initiate detection procedures as follows; the current control chip detecting a level status of each port thereof, and when detecting a port with a high level status, identifying the port as an upstream port electrically connected with an upstream control chip in the communication link, and configuring other ports to be in a weak pull-up mode; the current control chip detecting the level status of each of the other ports, and when detecting a port with a low level status, identifying the port as a downstream port electrically connected with a downstream control chip in the communication link; the current control chip outputting a high level through the downstream port thereof, for driving the downstream control chip connected with the downstream port to execute the same detection procedures.