Matrix Light Source Delayed Pixel Activation
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Solution Overview
Problem
Matrix light sources for motor vehicles experience high electric current peaks when all pixels are activated, leading to electromagnetic interference with other electronic components due to concentrated current consumption.
Innovation Solution
A matrix light source with an integrated circuit that delays the activation of each elementary light source by a predetermined period, smoothing the current intensity peak and reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If all elementary light sources are activated simultaneously, then the light output is maximized and response time is minimized, but electric current peaks occur causing electromagnetic interference
Solution Approach 1:
The patent divides the matrix array of elementary light sources into multiple sets, where each set is activated at different time delays. This segmentation of the activation process distributes the current consumption over time, preventing simultaneous activation of all pixels and thereby reducing electromagnetic interference while maintaining acceptable response time performance.
2Illumination intensity
If all pixels are activated at once, then the overall light intensity is maximized, but electric current consumption peaks increase
Solution Approach 1:
The patent implements periodic activation of pixel sets with different time delays. Instead of activating all pixels simultaneously, the system uses periodic activation patterns where each set of elementary light sources is turned on at a predetermined delay interval, smoothing out the current consumption profile while maintaining sufficient overall illumination intensity.
3Object-generated harmful factors
If delay units are added to each set of elementary light sources, then current peaks are reduced, but device complexity increases
Solution Approach 1:
The patent merges the delay functionality into an integrated circuit that controls multiple sets of elementary light sources. By combining the delay units and control logic into a single integrated circuit, the system reduces the overall number of discrete components while still achieving the goal of reducing current peaks through coordinated delayed activation of different pixel sets.
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 delayed activation of pixels reduces overall electric current consumption, minimizing electromagnetic radiation and interference with nearby electronic components without visibly affecting the light source's performance.
Implementation Method 1
A light-emitting diode (LED) is a semiconductor electronic component capable of emitting light when an electric current flows therethrough
Implementation Method 2
the integrated circuit comprises, for each of at least one set of elementary light sources, a delay unit configured so as to delay the activation of the elementary source by a predetermined period
Data Source
AI summary
The invention relates to a matrix light source comprising a plurality of elementary light sources with light-emitting semiconductor elements, and a common substrate that is in contact with an integrated circuit. The integrated circuit is configured to delay, for a predetermined duration, the light-up of the elementary sources, upon receiving a light-up command.