LED Channel Short Connection Detection Circuit
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Solution Overview
Problem
Existing LED driver circuits lack effective methods for detecting short connections between LED channels, which can lead to inefficient power distribution and potential damage, as they rely on traditional control and monitoring techniques that do not account for dynamic state changes in LED channels.
Innovation Solution
A system and method that utilize short detection circuitry to control LED channels to operate in different states, comparing electrical signals during these states to determine if a short connection exists, allowing for real-time identification and potential repair of short connections without disrupting the normal operation of the LED channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional control and monitoring techniques are used in LED driver circuits, then the device complexity is reduced, but the ability to detect short connections between LED channels is insufficient
Solution Approach 1:
The patent combines the LED driving function and short connection detection function into a single integrated driver circuit. The detection circuitry is merged with the existing LED driver, allowing short connection detection without requiring separate monitoring equipment, thus improving reliability while controlling complexity.
Solution Approach 2:
The LED driver circuit is designed to perform multiple functions: normal LED operation control and short connection detection. By making the driver circuit universal, it can operate in different modes (normal operation mode and detection mode) without requiring separate dedicated detection hardware, resolving the contradiction between detection capability and device complexity.
2Reliability
If LED channels are monitored continuously for short connections, then the reliability improves, but the loss of time for normal LED operation increases
Solution Approach 1:
The detection circuit operates periodically by switching between normal operation mode and detection mode. During detection mode, the circuit briefly measures parameters to detect short connections, then returns to normal operation. This periodic detection approach ensures reliable short connection detection while minimizing interruption to LED operation time.
Solution Approach 2:
The detection circuit performs preliminary checks during mode transitions or idle periods before full operation begins. By conducting detection actions in advance during state changes, the system can identify potential short connections without significantly interrupting the main LED operation, thus improving reliability while reducing operational time loss.
3Measurement precision
If the LED channels are switched between different states for detection, then the short connection detection precision improves, but the complexity of control increases
Solution Approach 1:
The detection system dynamically switches LED channels between different operational states (on/off states) to create measurable differences in electrical parameters. By controlling channels to be in different states during detection, the system can precisely identify short connections through parameter comparisons, while the dynamic state management is handled by existing LED driver control logic.
Solution Approach 2:
The system detects short connections by monitoring changes in electrical parameters (current, voltage) that occur when LED channels are switched between different states. By utilizing parameter changes naturally occurring during state transitions, the detection precision improves without requiring complex additional measurement equipment, as the existing driver circuitry can monitor these parameter variations.
Data Source
AI summary
This disclosure includes systems, methods, and techniques for detecting one or more short connections in a plurality of light-emitting diode (LED) channels. For example, a circuit includes processing circuitry configured to control a plurality of driving devices in order to cause a pair of LED channels of the plurality of LED channels to operate in a first state during a first period of time and operate in a second state during a second period of time. Additionally, the processing circuitry is configured to compare a first electrical signal corresponding to the first state of the pair of LED channels and a second electrical signal corresponding to the second state of the pair of LED channels and determine, based on the comparison of the first electrical signal and the second electrical signal, if a short connection exists between the pair of LED channels.