Light-Emitting Diode Module Power Separation for Stable Series Operation
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Solution Overview
Problem
Multiple light-emitting diode modules connected in series experience operational instability due to the instability of external power supplies, leading to abnormal operation of one or more diodes.
Innovation Solution
A light-emitting diode module design that separates power supply pins for the diodes and control circuit, using two independent external power supplies to provide stable voltage to the control circuit and individual power to each diode, ensuring precise control and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single external power supply is used to power both the light-emitting diodes and the control circuit, then the device complexity is reduced, but the operational stability deteriorates due to voltage fluctuations affecting multiple components
Solution Approach 1:
The patent divides the power supply system into two independent parts: a first external power supply dedicated to powering the light-emitting diodes and a second external power supply dedicated to powering the control circuit. This segmentation isolates voltage fluctuations in one subsystem from affecting the other, thereby improving operational stability while maintaining manageable device complexity through clear functional separation.
2Area of stationary object
If multiple light-emitting diode modules are connected in series, then the illumination coverage is extended, but the operational stability deteriorates due to cumulative power supply instability
Solution Approach 1:
Each light-emitting diode module is designed as an independent unit with its own dedicated power supply and control circuitry. This allows multiple modules to be connected in series to extend illumination coverage while each module maintains stable operation independently, preventing cumulative instability from propagating through the entire series connection.
Solution Approach 2:
The control circuit acts as an intermediary that receives stable power from the second external power supply and uses it to regulate the operation of light-emitting diodes powered by the first external power supply. This intermediary control mechanism ensures that voltage fluctuations in the diode power supply do not directly affect the control signals, maintaining operational stability across multiple series-connected modules.
3Ease of operation
If the control circuit and light-emitting diodes share the same power supply, then the ease of operation is improved, but the control precision deteriorates due to power fluctuations
Solution Approach 1:
The power supply is segmented into two independent sources: one for the control circuit and one for the light-emitting diodes. This ensures that the control circuit receives stable, fluctuation-free power, which is critical for precise control operations, while the diodes receive sufficient power for illumination. The separate connections maintain ease of operation through standardized power interfaces.
Data Source
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AI summary
A light-emitting diode module includes a casing, a lead frame, a plurality of light-emitting diodes, a control circuit, a first external power supply, a second external power supply, a first power supply pin, and a second power supply pin. The lead frame is disposed in the casing, and the lead frame has a first surface and a second surface. The second surface is opposite to the first surface. The light-emitting diodes include a first light-emitting diode, a second light-emitting diode and a third light-emitting diode, which are disposed on the first surface of the lead frame. At least one of the first light-emitting diode, the second light-emitting diode and the third light-emitting diode is electrically connected to the first external power supply through the first power supply pin, and the control circuit is electrically connected to the second external power supply through the second power supply pin.