Adaptive Driving Beam Aiming With Cross-Pattern Elbow Alignment
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Solution Overview
Problem
Existing vehicle headlamp aiming processes are hindered by the ambiguity of the cut-off line in low-beam light distributions, making it difficult to accurately adjust the optical axis and place the elbow point at a predetermined position.
Innovation Solution
A vehicle lamp apparatus featuring an adaptive driving beam lamp with individually controllable pixels and a controller that forms an aiming light distribution with a cross pattern, where the cross point corresponds to the elbow point of the low-beam light distribution, facilitating accurate optical axis adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low beam is kept turned on for aiming adjustment, then the aiming process can be performed with the actual light distribution, but the cut-off line becomes ambiguous and the elbow point becomes blurred, making aiming difficult
Solution Approach 1:
The patent segments the light distribution into two distinct patterns: a low beam pattern for normal operation and a cross pattern for aiming adjustment. The cross pattern is divided into vertical and horizontal lines that intersect at the elbow point position, creating distinct visual segments that are easier to detect and measure than the continuous ambiguous cut-off line of the low beam pattern.
Solution Approach 2:
The patent introduces a cross pattern as an intermediary visual aid during the aiming process. This cross pattern serves as a mediator between the adjustment mechanism and the target screen, providing clear reference lines that facilitate precise alignment without requiring the operator to interpret the ambiguous low beam cut-off line directly.
2Ease of operation
If a cross pattern is formed for aiming adjustment, then the elbow point recognition is improved with higher contrast and clarity, but the device complexity increases due to the need for individually controllable pixels
Solution Approach 1:
The patent makes the adaptive driving beam lamp multi-functional by enabling it to produce both the low beam light distribution for normal driving and the cross pattern for aiming adjustment. The same individually controllable pixels serve dual purposes: creating the functional low beam pattern and forming the aiming cross pattern, thereby reducing the need for separate dedicated aiming components.
Solution Approach 2:
The patent changes the light distribution parameters of the adaptive driving beam lamp dynamically. During normal operation, the lamp produces the standard low beam pattern with specific intensity distribution. During aiming adjustment, the controller modifies the pixel states to create the cross pattern with enhanced contrast and clarity, allowing the same hardware to adapt to different operational requirements without adding physical complexity.
Data Source
AI summary
A vehicle lamp apparatus has an adaptive driving beam lamp unit, and a controller. The adaptive driving beam lamp unit contains a plurality of individually controllable pixels, and is structured to emit a lamp beam with a light distribution that corresponds to states of the pixels. The controller is structured to control the light distribution of the adaptive driving beam lamp unit. The vehicle lamp apparatus can form an aiming light distribution in an aiming mode. The aiming light distribution contains a cross pattern whose cross point falls on a position that corresponds to an elbow point of a low-beam light distribution.