Digital Vehicle Lighting Setpoints for Optical Aberration Correction
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Solution Overview
Problem
Existing matrix light sources in motor vehicle lighting systems suffer from non-homogeneous spatial light distribution and geometric aberrations, particularly at the edges of the field of view, leading to blurred or distorted projected patterns and contours, which are difficult to correct without using more complex or expensive optical systems.
Innovation Solution
A digital filtering method is applied to the digital lighting setpoints before projection, anticipating and correcting geometric aberrations induced by the optical system, using dedicated digital filters for each elementary light source or groups of sources to adjust light intensity based on spatial distribution and location within the matrix.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a matrix light source with a large aperture optical system is used to achieve wide field of view coverage, then the field of view is improved, but the resolution at the edges of the field of view deteriorates due to geometric aberrations
Solution Approach 1:
The patent applies digital filtering to the lighting setpoints before projection to preemptively correct geometric aberrations. The calculation unit processes the digital setpoint data and applies filtering coefficients that anticipate and compensate for the blurring and distortion that would otherwise occur at the edges of the field of view, thereby maintaining projection precision across the entire wide field of view.
2Manufacturing precision
If complex optical systems are used to correct geometric aberrations and improve projection precision, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical/optical correction systems with a digital signal processing approach. Instead of using additional optical elements or complex lens arrangements to correct geometric aberrations, the invention uses a calculation unit that applies digital filtering to the lighting setpoints, substituting computational processing for mechanical/optical complexity while maintaining projection precision.
3Manufacturing precision
If complex optical systems are used to correct geometric aberrations, then the manufacturing precision is improved, but the production cost increases
Solution Approach 1:
The patent substitutes computational processing with optical correction, eliminating the need for expensive complex optical systems. The digital filtering approach uses software algorithms running on a calculation unit to correct geometric aberrations, which is significantly more cost-effective than manufacturing and installing complex optical correction elements while achieving the same projection precision.
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 approach enhances the precision of projected patterns and contours without requiring more complex optics, maintaining production costs while significantly improving optical performance, especially for functions like Adaptive Driving Beam (ADB), by preemptively addressing distortions and blurring.
Implementation Method 1
geometric aberrations induced by said optical system during the projection of a digital setpoint
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a method for adapting a setpoint for a digital lighting unit, which is intended to be projected by a digital lighting unit of a motor vehicle, comprising a matrix light source and an optical system. The method comprises a step of applying digital filtering to the digital setpoint. The filter used is capable of anticipating geometric aberrations induced by said optical system when projecting a digital setpoint.