LED Driving Circuit Backup Signal Routing for Cascaded Failure Tolerance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LED display systems, when one or multiple LED string units fail, the signal output terminal fails to output a normal control signal, causing the LED lamps to malfunction and affect image display.
Innovation Solution
An LED driving circuit with a main input terminal, backup input terminal, and output terminal that allows for the reception of configuration and data signals from either the main or backup input, enabling the circuit to forward these signals to subsequent circuits, even in the event of failures, using bridging parameters to ensure proper operation of subsequent circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If serial communication is used to forward control signals from one LED driving circuit to the next, then the system structure is simple and easy to manufacture, but the system reliability deteriorates when one driving circuit fails causing all subsequent circuits to malfunction
Solution Approach 1:
The patent divides the single serial communication path into multiple independent segments by adding backup input terminals to each LED driving circuit. Each circuit can independently receive signals from either the main input or backup input, creating segmented communication paths that prevent single-point failures from affecting the entire system.
Solution Approach 2:
The patent implements prior cushioning by pre-configuring backup input terminals and establishing alternative signal transmission paths before failures occur. When a driving circuit fails, the system can switch to backup paths that were prepared in advance, cushioning against the impact of failures on overall system reliability.
2Reliability
If backup input terminals are added to each LED driving circuit to receive signals from previous circuits, then the reliability of signal transmission improves, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing backup input terminals that can serve multiple functions: they can receive signals from any previous driving circuit in the chain, not just a single designated source. This multi-functionality allows the same backup terminal structure to handle various failure scenarios without requiring dedicated backup paths for each possible failure point.
Solution Approach 2:
The patent implements partial action by adding only the minimal necessary backup input terminals to each driving circuit rather than creating complete redundant duplicate systems. Each circuit receives signals from its main input and has backup capability to receive from previous circuits, providing sufficient reliability improvement without the excessive complexity of full system duplication.
3Area of stationary object
If multiple LED driving circuits are cascaded to expand display area, then the display area increases, but the risk of continuous failures increases affecting more LED strings
Solution Approach 1:
The patent transitions from a one-dimensional serial communication chain to a two-dimensional communication network by allowing each driving circuit to receive signals from multiple previous circuits through backup input terminals. This dimensional change creates redundant paths in the signal transmission network, enabling the system to expand in display area while maintaining fault tolerance through multiple signal sources.
Data Source
AI summary
Disclosed is an LED driving circuit and a driving method thereof, an LED display system. The LED driving circuit includes a main input terminal, a backup input terminal, and an output terminal. The LED driving circuit receives a configuration signal and a data signal from a preceding LED driving circuit via the main input terminal, or from any of previous LED driving circuits via the backup input terminal. The LED driving circuit forwards the configuration signal and the data signal of the LED driving circuits that are cascaded after the current LED driving circuit to a next LED driving circuit and/or to a following LED driving circuit that is connected to the current LED driving circuit across the next LED driving circuit via the output terminal. The present disclosure can ensure normal operation of following circuits even in case of continuous damage of some circuits.