Silicon Substrate LED Light Source with Integrated Control Circuit
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Solution Overview
Problem
The existing lighting modules for motor vehicles using LEDs face challenges in reducing bulk and weight due to the need for multiple printed circuit boards for power supply control, which occupy valuable space and increase weight.
Innovation Solution
Integration of an electronic circuit directly onto a silicon substrate with light-emitting diodes, allowing for control functions such as power management, temperature measurement, and switching between lighting modes, eliminating the need for external printed circuit boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple printed circuit boards are used for power supply control, then the control function is achieved, but the bulk and weight of the lighting module increase
Solution Approach 1:
The patent merges the LED light source and the electronic control circuit onto a single substrate. The electronic circuit is integrated directly on the substrate beneath the LED array, eliminating the need for separate control printed circuit boards. This consolidation achieves the control function while significantly reducing the overall weight and bulk of the lighting module.
2Reliability
If multiple printed circuit boards are used for power supply control, then the control function is achieved, but the space available for housing electronic components is consumed
Solution Approach 1:
The electronic control circuit is integrated directly on the same substrate that holds the LED array, merging the light source and control functions into a single compact unit. This eliminates the need for separate control printed circuit boards and frees up significant space within the lighting module housing for other components or miniaturization.
3Weight of stationary object
If electronic circuit is integrated on the substrate, then the volume and weight are reduced, but the manufacturing complexity increases
Solution Approach 1:
The substrate is divided into distinct functional zones: an active area for the LED array and a peripheral area for the electronic control circuit. This segmentation allows each zone to be optimized independently for its specific function while maintaining overall integration, thereby managing manufacturing complexity through functional zoning.
Solution Approach 2:
Different regions of the substrate are assigned different functions with appropriate local characteristics. The LED array area is optimized for light emission, while the peripheral circuit area is designed for electronic control functions. This local optimization enables integrated manufacturing while maintaining the specific requirements of each functional zone.
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 integration reduces the volume and weight of the lighting module, providing a compact and efficient LED light source with enhanced control capabilities while maintaining high luminance.
Implementation Method 1
An LED component emits light rays when a voltage with a value that is at least equal to a threshold value, referred to as direct voltage, is applied to its terminals
Implementation Method 2
The two substrates may preferably be attached to one another by solder, in particular by gold-tin solder
Data Source
AI summary
An electroluminescent light source including light-emitting diodes arranged on a substrate made of silicon. The light source integrates an electronic circuit performing a function that is necessary for controlling the light-emitting diodes.