Automotive Matrix Headlight Blur Zone for Glare-Free High Beam
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Solution Overview
Problem
Existing glare-free functionalities in automotive lighting devices suffer from high contrast between high beam and tunnel section luminous intensities, causing visual discomfort, and exhibit jerky light behavior due to relative movement, which are not adequately addressed by current technologies.
Innovation Solution
A method and device that implement a blurred light pattern with a gradient of luminous intensity less than 0.4 between adjacent pixels, ensuring smooth transition and reduced visual discomfort, and dynamically adjust the number of pixels based on intensity difference and movement speed to maintain smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a tunnel section with low luminous intensity is used to protect oncoming vehicles from high beam glare, then the harmful effect to oncoming vehicles is reduced, but the visual comfort of the driver is degraded due to high contrast between high beam and tunnel section
Solution Approach 1:
The patent applies local quality by creating a blur zone with gradually varying luminous intensity between the high beam pattern and the tunnel section. Instead of a sharp discontinuity, different zones (high beam, blur zone, tunnel section) have different intensity characteristics, with the blur zone specifically designed to have a gradient that reduces visual discomfort while maintaining glare protection.
Solution Approach 2:
The blur zone acts as an intermediary between the high beam pattern and the tunnel section. This intermediate zone with gradual intensity transition mediates the sharp contrast that would otherwise exist, providing a smooth visual transition that maintains both glare protection and driver comfort.
2Object-affected harmful factors
If the tunnel section moves dynamically to follow the protected vehicle, then the glare protection is maintained, but the light pixels behave in a jerky manner causing visual discomfort
Solution Approach 1:
The patent applies dynamics by making the blur zone movable to follow the protected vehicle. The blur zone is dynamically adjusted based on the position and movement of the protected vehicle, allowing the glare protection to remain effective while the blur zone's gradual transition smooths out the visual perception of movement.
Solution Approach 2:
The blur zone provides beforehand cushioning by creating a gradual intensity transition that cushions the visual impact of the tunnel section's movement. This pre-established gradient smooths the perceived motion, preventing jerky behavior while maintaining the protective function.
3Object-affected harmful factors
If the luminous intensity in the tunnel section is kept very low to protect oncoming vehicles, then the glare protection is improved, but the visual comfort is degraded due to sharp discontinuity
Solution Approach 1:
The patent applies parameter changes by introducing a gradient of luminous intensity in the blur zone. Instead of an abrupt change from high beam intensity to tunnel section intensity, the blur zone contains multiple intensity levels that gradually transition between these extremes, maintaining protection while improving visual comfort.
Data Source
Figure 1
Figure 2a~2b
AI summary
The invention is related to a method for correcting a light pattern provided by an automotive lighting device, wherein the light pattern is provided at least by a matrix arrangement of light sources. The method comprising a first step of projecting a high beam pattern with a first zone (1) where luminous intensity is lower, the first zone having a rectangular edge with four sides. The second step comprises providing a number of pixels for each of the four sides of the edge of the first zone, thus creating an upper blur zone (2), a lower blur zone (3), a left blur zone (4) and a right blur zone (5). A final step comprises creating a blur pattern for the upper blur zone (2) which extends along columns, a blur pattern for the lower blur zone (3) which extends along columns, a blur pattern for the left blur zone (4) which extends along rows and a blur pattern for the right blur zone (5) which extend along rows, where the luminous intensity in each row or column adapts from the luminous intensity of the first zone to the luminous intensity of the high beam pattern. An automotive lighting device configured to perform these steps is also provided.