Vehicle Lighting System With Reset Unit For Inrush Current Control
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Solution Overview
Problem
Current vehicle lighting systems using LED lights face inefficiencies due to the need for multiple power sources, leading to increased volume, cost, and risk of electronic component damage from inrush currents when switching between lighting modes.
Innovation Solution
A lighting system with a power supply unit, power conversion unit, lighting unit, switching unit, and reset unit, where the lighting modules are connected in series and controlled by separate power signals to manage light emission and prevent inrush currents through bypass circuits and reset mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power sources are used for different LED lamp functions, then each lamp function can be independently controlled, but the power supply volume increases, cost increases, and electronic component quantity increases
Solution Approach 1:
The patent applies a single power supply unit that can serve multiple LED lighting modules with different lamp functions (daytime running light, low beam, high beam, turn signals, fog light, position light). The power supply unit dynamically adjusts its output based on which lighting modules need power, eliminating the need for separate power sources for each function and thereby reducing overall system complexity while maintaining full functionality.
Solution Approach 2:
The patent merges multiple separate power supply circuits into a single integrated power supply unit that manages power distribution to all LED lighting modules. This consolidation reduces the number of electronic components, decreases power supply volume, and lowers cost while still enabling independent control of different lamp functions through switching units.
2Loss of energy
If LED lighting switches from high beam to low beam, then energy consumption is reduced, but inrush current damages electronic components
Solution Approach 1:
The patent introduces a reset unit that performs preliminary action before the power conversion unit restarts after a lighting mode change. When switching from high beam to low beam, the reset unit first waits for the capacitor to discharge to a safe level, then initiates the restart sequence. This preliminary discharge action prevents inrush current from damaging electronic components while still allowing rapid response to lighting changes.
Solution Approach 2:
The reset unit acts as a protective cushion between the power conversion unit and the LED lighting modules. It monitors capacitor voltage and controls the restart timing, cushioning against the harmful inrush current that would otherwise damage electronic components during transitions between lighting modes.
Data Source
AI summary
A lighting system includes a power supply unit, a power conversion unit, a lighting unit, a first switching unit, and a first reset unit. The power supply unit is used to supply a first and a second power signal. The power conversion unit receives and converts the first power signal. According to the first power signal, a first lighting module of the lighting unit emits light. The first switching unit is connected to a first node between the first lighting module and a second lighting module for receiving the second power signal, so that the second lighting module emits light according to the second power signal. The first reset unit receives the second power signal; wherein when the second lighting module changes from lighting to no lighting, the first reset unit causes the power conversion unit to stop operating and then restart.