Vehicle LED Matrix Lighting with Mixed Pixel Sizes and Currents
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Solution Overview
Problem
Existing lighting devices for motor vehicles with LED matrices face challenges in achieving the necessary aspect ratio for low and high beam light distributions while minimizing electronic component costs and maintaining resolution, often requiring complex control of pixels of varying sizes and shapes.
Innovation Solution
The lighting device employs light-emitting diodes with different sizes and shapes operated by distinct currents, utilizing driver modules to control individual or grouped diodes, allowing for flexible integration and reduced component requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If many pixels or larger pixels are used to obtain the necessary aspect ratio, then the aspect ratio requirement is met, but electronic component costs increase and resolution decreases
Solution Approach 1:
The patent applies local quality by using light-emitting diodes with different light-emitting surface areas at different positions in the matrix. Specifically, light-emitting diodes in the horizontal direction have different surface areas than those in the vertical direction, allowing the system to achieve the required aspect ratio without uniformly increasing pixel count or size across the entire matrix. This localized variation in pixel characteristics resolves the contradiction between maintaining aspect ratio and minimizing pixel quantity.
2Quantity of substance
If pixels of different sizes and shapes are used, then the desired design is implemented with fewer pixels, but control of individual pixels becomes more complicated
Solution Approach 1:
The patent changes the physical parameter of pixel size rather than varying pixel quantity or position. By using light-emitting diodes with different light-emitting surface areas, the system achieves the required aspect ratio and design flexibility while maintaining uniform pixel control characteristics. This parameter change approach allows fewer pixels to be used without significantly increasing control complexity, as the control architecture remains relatively simple despite the physical variation in pixel sizes.
3Device complexity
If uniform pixel sizes with symmetrical distribution are used, then control is simplified, but the necessary aspect ratio for low and high beam lights cannot be obtained
Solution Approach 1:
The patent introduces asymmetry into the pixel matrix by using light-emitting diodes with different light-emitting surface areas in different directions. Specifically, the matrix contains light-emitting diodes with first surface areas in the horizontal direction and second surface areas in the vertical direction, where these areas differ to achieve the required aspect ratio. This asymmetric design allows the system to meet optical requirements while keeping control electronics relatively simple by maintaining a regular matrix structure with predictable addressing schemes.
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 configuration reduces electronic component costs and complexity, maintains the necessary aspect ratio, and enhances resolution by using fewer pixels with varied sizes and shapes, facilitating integration into different vehicle systems.
Implementation Method 1
Lighting devices with light-emitting diodes (LED) arranged in a matrix for the targeted generation of pixels in a light distribution
Data Source
AI summary
A lighting device is provided for a motor vehicle, and contains a light source with numerous light-emitting diodes with which pixels in a light distribution generated outside the motor vehicle are generated in a targeted manner. Each of the light-emitting diodes has a light-emitting surface. The light-emitting surfaces are placed in first and second rows to form a matrix, in which the light distribution extends horizontally (X) and vertically (Y) outside the motor vehicle. The light source contains at least one first light-emitting diode with first light-emitting surfaces, and at least one second light-emitting diode with second light-emitting surfaces. The first light-emitting surfaces are smaller than the second light-emitting surfaces. The lighting device operates the at least one first light-emitting diode with a first current, and the at least one second light-emitting diode with a second current. The first current is weaker than the second.