Discrete Linear Circuit for LED Current Stability
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Solution Overview
Problem
Existing discrete component wiring methods fail to maintain stable current when multiple LED lamps are used in parallel, leading to increased risk of bulb burnout due to unstable external power supplies.
Innovation Solution
A discrete component linear circuit design incorporating a switch, fuse, varistor, rectifier, triodes, resistors, and thermistors that adjusts resistance in response to temperature changes, maintaining current stability and enhancing voltage capacity for parallel LED lamp usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LED lamps are used in parallel with existing wiring methods, then the illumination coverage is improved, but the current stability deteriorates due to external power supply fluctuations
Solution Approach 1:
The patent employs a feedback mechanism where the first triode's base is connected to the LED lamp output, creating a closed-loop control system. When current fluctuates due to power supply changes, the triode automatically adjusts its conduction state to compensate, maintaining stable current distribution across parallel LED lamps without requiring external control circuits.
Solution Approach 2:
The patent introduces triodes as intermediary components between the power supply and LED lamps. These triodes act as current regulation mediators that isolate the LED lamps from power supply fluctuations, enabling stable operation of multiple parallel lamps while accommodating external voltage variations.
2Device complexity
If the circuit resistance is maintained unchanged to simplify the circuit design, then the device complexity is reduced, but the current control capability deteriorates when voltage fluctuates
Solution Approach 1:
The patent transforms the static resistance circuit into a dynamic current control system using triodes. Instead of relying on fixed resistors that cannot adapt to voltage changes, the triode's base-emitter junction provides dynamic resistance modulation based on instantaneous current conditions, enabling automatic current stabilization while maintaining circuit simplicity.
Solution Approach 2:
The patent changes the control parameter from fixed resistance values to variable current conduction characteristics of triodes. By utilizing the triode's inherent current-voltage relationship and controlling it through base current, the circuit achieves adaptive current regulation that responds to power supply fluctuations without requiring complex resistance networks.
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
The circuit ensures stable current flow and increased voltage bearing capacity, allowing for safer and more efficient use of multiple LED lamps in parallel by dynamically adjusting resistance with temperature changes.
Implementation Method 1
a thermistor T1 is connected between the resistor R1 and an input end of an LED lamp
Implementation Method 2
an output end of the fuse F1 is connected to an AC1 end of the rectifier DB1 for input and is connected to an input end of the varistor MOV1
Implementation Method 3
a base of the triode Q1 is connected to an emitter thereof and then is connected to a base of the triode Q2
Data Source
AI summary
A discrete component linear circuit of a line is provided, including a switch S1, a fuse F1, a varistor MOV1, a rectifier DB1, a triode Q1 to a triode Q6, and a resistor R1 to a resistor R6, wherein an input end of the switch S1 is connected to an input end L of a power supply for input, and an output end of the switch S1 is connected to an input end of the fuse F1. When an input voltage increases, a current increases, and resistance values of a thermistor T1, a thermistor T2 and a thermistor T3 increase due to temperature rise. The resistance increases synchronously when the voltage increases, so that the current is maintained in a relatively stable interval. Therefore, the voltage bearing capacity when an LED lamp works is increased, and more LED lamps may be used in parallel.