Vehicle LED Light Source Switching System with Shared Power Supply
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Solution Overview
Problem
Current LED lamp systems in vehicles require separate power supplies for different functions, leading to larger, more costly, and resource-intensive setups due to the use of individual power supplies for each LED type.
Innovation Solution
A light source switching system that employs a switching power supply architecture, allowing multiple LEDs to be connected in series and using a signal input terminal, detection units, switch driving units, and a DC conversion unit to control the power distribution among LEDs, enabling simultaneous or separate activation of multiple LEDs connected in parallel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate power supplies are used for each LED function, then each LED can be independently controlled, but the system size, cost, and resource usage increase
Solution Approach 1:
The patent combines multiple separate power supplies into a single shared power supply system. The controller manages multiple LED strings (daytime running lamp LED string, headlamp LED string, fog lamp LED string) using one power supply unit, reducing the overall number of components while maintaining independent control capability through electronic switching and control circuitry.
Solution Approach 2:
The single power supply unit is designed to serve multiple functions by powering different LED strings for various lighting functions. The controller can allocate power to different LED strings based on operational requirements, making the power supply system universal rather than dedicated to a single function.
2Reliability
If multiple separate power supplies are used, then each LED function has dedicated power, but cost and resource consumption increase
Solution Approach 1:
Multiple dedicated power supplies are merged into a single shared power supply system that serves all LED functions. This reduces resource consumption and cost by eliminating redundant power supply components while maintaining reliable power delivery through centralized control and distribution.
Solution Approach 2:
The unified power supply system is designed with multi-functionality to reliably power different LED strings for various lighting functions. The controller intelligently manages power allocation to maintain reliability equivalent to or better than separate dedicated supplies, while significantly reducing overall resource usage.
3Device complexity
If a single power supply is used for multiple LEDs, then size and cost are reduced, but control flexibility may be limited
Solution Approach 1:
The system employs dynamic control through a controller that can switch between different LED strings based on operational requirements. The controller adjusts power distribution dynamically, enabling flexible control of daytime running lamps, headlamps, fog lamps, and other functions using a single static power supply unit.
Solution Approach 2:
A controller acts as an intermediary between the single power supply and multiple LED strings. This intermediary manages power allocation, switching, and control signals to maintain full functional flexibility despite the simplified power supply architecture. The controller enables independent control of each LED function through electronic switching circuits.
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 solution reduces the need for multiple power supplies, minimizing size, cost, and resource usage while allowing flexible control over LED lighting functions, enabling efficient and cost-effective operation of various LED lamps in vehicles.
Implementation Method 1
a DC conversion unit electrically connected to the first, second and third input circuits and the dimming control unit
Data Source
AI summary
A light source switching system and a method thereof include a signal input terminal; first, second and third input circuits; a dimming control unit; a DC conversion unit; first and second switch circuits; and first, second and third light emitting elements. The second and third input circuits respectively include first and second detection units and first and second switch driving units. The DC conversion unit is connected to the first, second, and third input circuits and the dimming control unit. The first and second switch circuits are respectively connected to the DC conversion unit and the first and second switch driving units. The first light emitting device is connected to the DC conversion unit. The second and third light emitting devices are respectively connected to the first and second switch circuits, wherein the first, second and third light emitting devices are connected in parallel with each other.