LED Control Device With Switching Elements For Headlight Channels
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Solution Overview
Problem
Current LED control devices for headlights are inefficient as they require all LEDs in a channel to be powered, leading to energy wastage and potential damage from hard short circuits, even when not all LEDs are needed, limiting the ability to optimize illumination and LED arrangement.
Innovation Solution
The LED control device allows individual LED control and channel bundling using switching elements, enabling only necessary LEDs to be active in required channels, thus maximizing the number of LEDs connected in series and minimizing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If all LEDs in a channel are powered to ensure channel operation, then the channel can provide illumination, but energy is wasted when not all LEDs are needed
Solution Approach 1:
The patent segments the channel into active LED segments and inactive LED segments. Switching elements divide the channel into multiple sub-channels, allowing individual LEDs to be controlled independently while maintaining the series connection structure. This enables selective activation of only the necessary LEDs, improving energy efficiency without sacrificing adaptability.
Solution Approach 2:
The patent introduces dynamic switching elements that can change the configuration of LED connections in real-time. These switching elements allow the system to dynamically reconfigure which LEDs are active and which are short-circuited, enabling flexible adaptation to different illumination requirements while maintaining optimal energy efficiency.
2Loss of energy
If hard short circuits are used for inactive LEDs to save energy, then power consumption decreases, but current spikes and damage risk increase
Solution Approach 1:
The patent implements soft short circuits as a protective measure before harmful current spikes can occur. Instead of direct hard short circuits, the switching elements provide a controlled transition path with limited current flow, cushioning against potential damage to other LEDs in the channel while still achieving energy savings for inactive LEDs.
Solution Approach 2:
The switching elements act as intermediary components between the active LEDs and inactive LEDs. They provide a controlled impedance path for inactive LEDs, mediating the electrical connection to prevent harmful current spikes while still allowing the inactive LEDs to be effectively disconnected from the power supply, thus reducing power consumption without compromising reliability.
3Productivity
If maximum number of LEDs are connected in series per channel, then channel efficiency is maximized, but flexibility to control individual LEDs is reduced
Solution Approach 1:
The patent merges the advantages of series connection (high efficiency) with individual LED control capability. By introducing switching elements that can selectively connect or disconnect individual LEDs within the series string, the system maintains the high efficiency of series operation while adding the flexibility to control individual LEDs, effectively combining both requirements.
Solution Approach 2:
The switching elements provide multi-functionality by serving dual purposes: maintaining the series connection structure for efficiency and enabling individual LED control for flexibility. This universal component allows the system to operate in multiple modes, achieving both high channel efficiency and ease of individual LED operation.
Data Source
Figure 1
AI summary
A large number of LEDs can be controlled channel by channel via an LED control unit specifically designed for headlights. Each channel allows for a predefined maximum number of LEDs to be connected in series. The LED control unit is designed so that the LEDs can be addressed individually, at least partially, and can be variably switched from channel to channel via switching elements. This ensures that the number of LEDs controlled is minimized across all channels, thereby maximizing the number of series-connected LEDs in as many channels as possible.