Multi-Color LED Unit Local Temperature Compensation
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Solution Overview
Problem
Existing multi-color LED units in motor vehicles have insufficient local temperature compensation, leading to non-uniform illumination due to central parameterization, which cannot effectively account for varying operating conditions of individual LED units.
Innovation Solution
Each multi-color LED unit is designed as an individual semiconductor device with a microcontroller that integrates a temperature compensation algorithm, allowing for precise control of single-color LEDs based on instantaneous temperature, ensuring constant color point and brightness, and optionally incorporating a temperature sensor or using characteristics to ascertain temperature values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If parameterization is stored in a central processing module, then device complexity is reduced, but manufacturing precision deteriorates due to insufficient local temperature compensation
Solution Approach 1:
The patent divides the control system into multiple independent LED units, each with its own microcontroller and temperature compensation algorithm. This segmentation allows each unit to independently adjust its operating parameters based on local temperature conditions, thereby maintaining color point uniformity across the entire illumination device while managing complexity through modular design.
Solution Approach 2:
The patent implements local temperature compensation by equipping each LED unit with its own temperature sensor and control algorithm. This enables each unit to independently sense and compensate for local temperature variations, ensuring that color point and brightness remain uniform across different thermal zones within the illumination device.
2Ease of operation
If LED units are controlled via centralized parameterization, then ease of operation is improved, but reliability deteriorates due to non-uniform appearance under varying thermal conditions
Solution Approach 1:
The patent segments the illumination device into multiple independently controlled LED units, each capable of autonomous temperature compensation. This segmentation maintains ease of operation through simple centralized command issuance while improving reliability by allowing each unit to independently adapt to its local thermal environment, preventing appearance non-uniformity.
Solution Approach 2:
The patent implements feedback control within each LED unit by continuously monitoring local temperature via integrated sensors and automatically adjusting operating parameters through embedded algorithms. This feedback mechanism ensures that each unit maintains its specified color point and brightness despite temperature variations, thereby ensuring overall appearance uniformity and reliability.
3Manufacturing precision
If temperature compensation is implemented at the LED unit level, then manufacturing precision is improved, but device complexity increases due to additional microcontrollers and sensors
Solution Approach 1:
The patent merges the temperature sensor, microcontroller, and LED elements into integrated LED units. This merging approach improves manufacturing precision by enabling local temperature compensation while managing device complexity through consolidation of components into modular units, reducing the need for extensive external wiring and control infrastructure.
Solution Approach 2:
The patent enables each LED unit to be self-sufficient by integrating temperature sensors and control algorithms directly within each unit. This self-service capability allows each unit to autonomously sense its local temperature and adjust its operating parameters without requiring complex external control systems, thereby improving color point control while actually reducing overall device complexity through decentralization.
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 enables a uniformly consistent appearance of the illumination device by accurately adjusting brightness and color point according to local temperature conditions, preventing damage from excessive heat and ensuring a homogeneous light effect.
Implementation Method 1
the microcontroller is set up to control each single-color LED of a respective multi-color LED unit depending on an instantaneous temperature value of the respective multi-color LED unit in such a way that a set color point and a set brightness are kept constant
Implementation Method 2
integrated within the semiconductor device of at least some of the multi-color LED units is a temperature sensor, which is set up to measure the instantaneous temperature value of the respective multi-color LED unit
Data Source
AI summary
An illumination device for a motor vehicle includes one or more multi-color LED units which each have a settable color point and settable brightness, wherein each multi-color LED unit is an individual semiconductor component having multiple single-color LEDs of different colors and a microcontroller. The single-color LEDs and the microcontroller are surrounded by a housing of the semiconductor component. The microcontroller is designed to control each single-color LED of an associated multi-color LED unit depending on a current temperature value of the associated multi-color LED unit in such a way that a set color point and a set brightness are held constant during operation of the associated multi-color LED unit.