LED Voltage Stabilization via Equalizing Resistance
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Solution Overview
Problem
Conventional LED devices connected in series or series-parallel configurations with voltage-limiting units, such as zener diodes, experience uneven voltage distribution due to differing properties of LEDs and zener diodes, leading to potential damage from abnormal high voltages.
Innovation Solution
The LED device incorporates a light-emitting unit structured by connecting LEDs in parallel with a voltage-limiting unit and further connecting these units in parallel with a voltage-equalizing resistance, ensuring stable end voltage across each set when connected in series or series-parallel configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LEDs are connected in parallel with voltage-limiting units (such as zener diodes) to form light-emitting units, then abnormal voltage is absorbed by the voltage-limiting unit, but voltage is not evenly distributed when multiple sets are connected in series or series-parallel, causing uneven current distribution and potential LED damage
Solution Approach 1:
A voltage-equalizing resistance is introduced as an intermediary component connected in parallel with each light-emitting unit. This resistance acts as a mediator to balance the voltage distribution across multiple series-connected light-emitting units, ensuring even current distribution while maintaining the voltage-protection function of the voltage-limiting unit.
Solution Approach 2:
The patent modifies the circuit configuration by adding the voltage-equalizing resistance with specific resistance values that change the overall impedance characteristics of each light-emitting unit. This parameter change enables uniform voltage distribution across series-connected units while preserving the voltage-limiting protection capability.
2Reliability
If voltage-limiting units are used to protect LEDs from abnormal voltage, then voltage stabilization is achieved, but the different properties of LEDs and voltage-limiting units cause uneven voltage distribution in series configurations
Solution Approach 1:
The voltage-equalizing resistance serves as a mediator component that balances the voltage distribution across multiple light-emitting units connected in series. It compensates for the different electrical properties of LEDs and voltage-limiting units, ensuring uniform voltage distribution while maintaining voltage stabilization.
Solution Approach 2:
The voltage-equalizing resistance creates equipotential conditions across the series-connected light-emitting units by providing a common reference impedance. This ensures that each unit experiences the same voltage level, eliminating uneven voltage distribution while preserving voltage stabilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration stabilizes end voltage across each set of light-emitting units, preventing damage from abnormal high voltages and ensuring even voltage distribution, thereby enhancing the reliability and longevity of the LED device.
Implementation Method 1
two ends of each LED and voltage-limiting unit being connected in parallel with an voltage-equalizing resistance, so that when plural sets of the light-emitting units are connected in series or in series-parallel in the same polarity, the end voltage of each set is stabilized by the voltage-equalizing resistance
Data Source
AI summary
The present invention provides a LED device with voltage-limiting unit and voltage-equalizing resistance in which a light-emitting unit is structured through a LED being connected in parallel with a voltage-limiting unit in the same polarity, and two ends thereof being further connected in parallel with an voltage-equalizing resistance, so that when plural sets of the light-emitting units are connected in series or in series-parallel in the same polarity, the end voltage of each set is stabilized by the voltage-equalizing resistance connected in parallel with the two ends of the LED and the voltage-limiting unit.