Self-Healing Lighting Device with Automatic Switching
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Solution Overview
Problem
Lighting devices in critical applications like automotive lighting face challenges in maintaining constant illumination due to the finite lifespan of light-emitting elements, which can lead to diminished light output and require timely replacement, often delayed in detection and execution.
Innovation Solution
A self-healing lighting device with a voltage source, current sensor, lighting controller, and switch box that automatically switches between sets of light-emitting elements based on current detection, ensuring continuous illumination and alerting users to burned-out components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If lighting elements are used to provide illumination, then light output is achieved, but the lighting elements will eventually burn out due to age, damage, or defect
Solution Approach 1:
The lighting system is divided into multiple independent lighting sets (first lighting set and second lighting set), each capable of providing illumination independently. When one set burns out, the other can take over, ensuring continuous light output while distributing the wear and failure risk across separate segments.
Solution Approach 2:
The system proactively switches to an alternate lighting set before the current set completely fails. The controller detects diminished light output or current changes indicating impending failure, and preemptively activates the backup lighting set to maintain continuous illumination without interruption.
2Reliability
If multiple lighting sets are implemented for redundancy, then reliability is improved, but device complexity increases
Solution Approach 1:
Multiple lighting sets are combined within a single lighting device housing, sharing common control circuitry, power management, and detection mechanisms. The controller统一管理 both lighting sets, and the switch box integrates the switching logic for both sets, reducing overall system complexity despite having redundant lighting elements.
Solution Approach 2:
The controller serves multiple functions: it detects current levels, determines when switching is needed, controls the switch box, and manages both lighting sets. The switch box handles both lighting sets with a single integrated switching mechanism. This multi-functionality reduces the need for separate dedicated components for each lighting set.
3Productivity
If automatic switching between lighting sets is implemented, then productivity is improved by eliminating manual replacement delays, but detection and measurement difficulty increases
Solution Approach 1:
The controller continuously monitors the current flowing through the lighting elements and uses this feedback to detect changes in light output. When the current drops below expected levels or shows patterns indicating element failure, the controller automatically triggers a switch to the alternate lighting set, enabling rapid response without manual intervention.
Solution Approach 2:
The system replaces manual visual inspection and physical replacement of burnt-out lights with an automated electronic detection and switching system. The controller uses electrical current measurement instead of human visual detection, and automatic electronic switching instead of manual mechanical replacement, significantly improving response time and eliminating human factors in the detection process.
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 device maintains consistent lighting levels by automatically switching to functional elements, providing timely warnings for replacements and extending the lifespan of light-emitting elements by distributing wear evenly.
Implementation Method 1
a current sensor located between the voltage source and the light engine, and configured to detect a current passing between the voltage source and the light engine
Implementation Method 2
each lighting element includes a first light-emitting diode in a first orientation, and a second light-emitting diode in a second orientation opposite the first orientation
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
A lighting device (100), including a voltage source (110); a light engine (160) including one or more lighting elements (320) between a first power line and a second power line; a current detector (120) between the voltage source (110) and the light engine (160); a switch box (150) between the voltage source (110) and the light engine (160), connected to the electrical power, to ground, to the first power line, and to the second power line, and configured to switch the light engine (160) between a first configuration in which the first power line is connected to the electrical power and the second power line is connected to ground, and a second configuration in which the second power line is connected to the electrical power and the first power line is connected to ground; a lighting controller (130) configured to generate the switch control signal based on the detected current passing between the voltage source (110) and the light engine (160).