Vehicle Headlamp Spatial Light Modulator Gradual Intensity Transition
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Solution Overview
Problem
The existing vehicle headlamps with spot-like high luminous intensity regions create a clear light and darkness boundary, making it difficult for drivers to view, especially in varying driving conditions.
Innovation Solution
A vehicle headlamp configuration that includes a spatial light modulator and a control device to form a light distribution pattern with a high luminous intensity region and an adjacent low luminous intensity region, where the luminosity gradually decreases, and the size, intensity, and position of these regions can be adjusted based on driving conditions using scanning, rotation, or matrix LED mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a spot-like high luminous intensity region is formed in the light distribution pattern, then visibility is improved, but a clear light and darkness boundary is created making it difficult for drivers to view
Solution Approach 1:
The patent applies local quality by creating different luminous intensity characteristics in different regions of the light distribution pattern. Specifically, a high luminous intensity region (spot region) is formed in the central area to improve visibility, while a low luminous intensity region with gradationally decreasing intensity is formed in the peripheral area to reduce the light and darkness boundary effect. This spatial variation in luminous intensity quality resolves the contradiction between improving visibility and reducing viewing difficulty.
Solution Approach 2:
The patent changes the luminous intensity parameter across different regions of the light distribution pattern. By controlling the spatial light modulator, the system creates a high luminous intensity region with intensity above a predetermined threshold in the central area, and a low luminous intensity region with intensity below the threshold that gradationally decreases from the outer edge toward the outside. This parameter change approach allows the system to simultaneously achieve improved visibility and reduced light and darkness boundary effects.
2Adaptability or versatility
If the spatial light modulator is controlled to form various light distribution patterns, then adaptability to different driving conditions is improved, but device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical optical systems with a spatial light modulator that can be controlled electronically to form various light distribution patterns. The spatial light modulator, when controlled by the control device, can dynamically adjust the light distribution pattern according to different driving conditions without requiring mechanical reconfiguration of optical components. This substitution reduces mechanical complexity while improving adaptability.
Solution Approach 2:
The patent implements dynamic control of the light distribution pattern through the spatial light modulator and control device. The system can dynamically adjust the luminous intensity distribution, creating high and low luminous intensity regions in different spatial configurations according to real-time driving conditions. This dynamic capability allows the system to adapt to various driving scenarios without requiring multiple fixed optical systems, thereby managing complexity while enhancing versatility.
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 the difficulty in viewing due to light and darkness boundaries while maintaining a necessary high luminous intensity region, improving visibility and forming various light distribution patterns suitable for different driving conditions.
Implementation Method 1
forming a desired light distribution pattern by radiating light emitted from the light source forward via the spatial light modulator
Implementation Method 2
a scanning mechanism that has a mirror pivotable in two axial directions that reflects light emitted from the light source and performs scanning with the light from the light source reflected while pivoting the mirror
Implementation Method 3
a rotation mechanism that rotates in one direction around a rotation axis while reflecting the light emitted from the light source and has a rotary reflector provided with a reflective surface that performs scanning with light of the light source reflected while rotating
Data Source
AI summary
A vehicle head lamp includes a spatial light modulator and a control device. The vehicle head lamp forms a desired light distribution pattern by radiating light forward via the spatial light modulator, a high luminous intensity region and a low luminous intensity region adjacent to an outer edge of the high luminous intensity region are formed in the desired light distribution pattern to be irradiated by controlling the spatial light modulator, the low luminous intensity region is configured such that the luminous intensity decreases gradationally from the outer edge of the high luminous intensity region toward an outside of the low luminous intensity region, and the control device controls the spatial light modulator so as to relatively change at least one of sizes, luminous intensities, and positions of the high luminous intensity region and the low luminous intensity region based on a traveling condition of a vehicle.