Anti-Glare Systems in Automotive Headlights
This page brings patents & research papers for reducing headlight glare to oncoming and preceding vehicles, using:
- Camera-Based Object Detection and Adaptive Dimming – Vision systems with object position detection, reflective surface categorization with machine learning, and dynamic LED intensity adjustment.
- Dynamic Beam Pattern Reconfiguration – Motorized vertical adjustment for low beam glare reduction, movable light-shielding elements creating cut-off lines, and asymmetrical ADB control with lane-specific illumination patterns.
- PDLC and Liquid Crystal Glare Control – LDR-integrated polymer dispersed liquid crystal films with automatic opacity adjustment, segmented liquid crystal lights, and real-time light intensity adaptation.
- LED-Based Reflective Element Detection – Alternating emission and detection cycles identifying reflective surfaces like raindrops, sensor-controlled overlapping beams with vertical light-dark boundaries, and flickering-based obstacle highlighting.
- Mechanical Shading and Shielding Systems – Motor-driven movable shading plates, light-shielding plates with matte surfaces at focal points, and partitioned blinds for selective glare suppression.
1. Vehicle Lamp with Motorized Vertical Adjustment for Low Beam Glare Reduction
KOITO MANUFACTURING CO LTD, 2025
Vehicle headlamp system for reducing glare to oncoming vehicles, especially during host vehicle turns. The invention uses a motorized actuator to vertically displace the entire optical unit (light source, reflector/lens) downward. This dynamically lowers the low-beam cutoff line and emission direction when an oncoming vehicle is detected, particularly on curved roads where beam crossover causes dazzle. The mechanical solution ensures uniform glare reduction while preserving road illumination, offering a simpler, cost-effective alternative to electronic matrix/ADB systems.
2. Dynamic LED Headlamp Intensity Adjustment System with Object-Based Dimming Control
FORD GLOBAL TECHNOLOGIES, LLC, 2023
Method to reduce glare from vehicle headlights for better driver comfort and safety. The method involves dynamically adjusting the intensity of individual LEDs in the headlamps based on detected objects in the environment. When a potential glare source is found, it dims the LEDs adjacent to the source while maintaining brightness elsewhere. This gradual transition prevents harsh transitions in brightness that can cause eye strain. The dimming range is adjustable to balance glare suppression and light output.
3. Method for Controlling Headlamp with Angle-Based U-Shaped Glare Reduction Range
HELLA GMBH & CO KGAA, 2021
A method for controlling a motor vehicle headlamp to reduce glare on detected objects such as road signs, vehicles, or pedestrians. The invention addresses inaccuracies in conventional glare reduction systems that depend on error-prone distance measurements from cameras. The core solution relies solely on the angle between the vehicle's longitudinal axis (through the detector) and the line connecting to the object (or its farthest edge to counter parallax). This angle determines a glare reduction range in the light distribution, where brightness is lowered (e.g., dimmed zone, often U-shaped). An optional angle-dependent correction value adjusts range edges for reliable object coverage, independent of distance. The approach enables precise, robust adaptive glare control via camera-based detection and headlamp modulation, improving safety in ADB-like systems without complex distance computation
4. Vehicle Headlight System with Dynamic Beam Pattern Adjustment Using Movable Light-Shielding Element
HASCO VISION TECHNOLOGY CO LTD, 2021
A vehicle headlight system with controllable glare reduction for oncoming/preceding vehicles or objects. The invention centers on a segmented light guide device integrated between the light source and output optics. This light guide incorporates liquid crystal (LC) material sandwiched between transparent substrates, divided into independently controllable segments. The solution enables selective segment activation, each can switch between an anti-glare output state (e.g., dimmed, scattered, or blocked to reduce brightness/intensity in targeted zones) and a normal/high-output state. By dynamically controlling LC segments based on detected object positions (via camera/sensor input), the system creates localized low-brightness areas in the beam pattern for precise glare mitigation while preserving overall illumination. This LC-based adaptive control provides a flexible, non-mechanical alternative to matrix LEDs or shutters in ADB/glare-free systems
5. Headlight System with Segmented Light Guide and Liquid Crystal-Based Glare Control
MAGNA CLOSURES INC, 2021
The invention features a headlight comprising separate, controllably dimmable light modules (e.g., LED-based) arranged to form the overall beam pattern. A photodetector (or sensor array) detects glare-causing objects like oncoming vehicles or reflective signs. The solution dynamically adjusts individual light units intensity or output based on photodetector feedback, creating localized dimmed zones in the beam to reduce glare toward detected objects while maintaining high illumination elsewhere. This enables precise, adaptive anti-glare control without full matrix complexity, enhancing safety in varied driving conditions through targeted brightness modulation
6. Headlight Assembly with Independent Light Units and Photodetector-Controlled Glare Prevention
HELLA GMBH & CO KGAA, 2021
Glare-free headlight for a motor vehicle with a plurality of light units, each comprising a light source element, projection optics, and photodetector. The photodetector detects reflected light from the light source element and assigns it to the corresponding light source element, enabling automatic switching off of the light source element to prevent glare. Each light source element has its own optical axis and projection optics, allowing for independent control and detection of reflected light.
7. Headlight System Glare Control via Object Position Detection and Adaptive Light Dimming
DAIMLER AG, 2021
The invention integrates, per light unit, a light source (e.g., LED) with projection optics and a dedicated photodetector. Upon detecting reflected light from objects (oncoming vehicles, pedestrians, signs) via its photodetector, the corresponding light source is selectively deactivated or dimmed, creating localized dark zones in the beam pattern. This camera-free approach uses direct reflection sensing for fast, accurate glare reduction, supports test pulses below flicker threshold for reactivation, and achieves cost-effective, robust adaptive control with overlapping coverage across units offering a simpler alternative to complex camera-based ADB/matrix systems
8. Headlight Illumination Adjustment Method Using Reflective Surface Categorization
JAGUAR LAND ROVER LTD, 2020
A method for headlight system, and controller for reducing glare experienced by the host vehicle driver from reflective surfaces illuminated by the vehicle's own headlights. The invention addresses driver fatigue, eye strain, and impaired visibility caused by bright reflections (e.g., from road signs, wet roads, or oncoming vehicles) without fully de-illuminating objects or applying uniform dimming that obscures information. The solution uses a camera/sensor to capture image data of the illuminated environment, then performs two-stage brightness analysis: first threshold identifies potential glare surfaces (disregarding precipitation/self-reflection); second threshold categorizes them as medium or high glare. Headlight intensity is then spatially reduced in the direction of these surfaces e.g., ~50% for medium, ~80% for high-via controllable LED arrays, preserving contrast and object visibility while minimizing dazzle. The approach enables prolonged high-beam use with targeted, adaptive adjustments for enhanced safety and comfort
9. Asymmetrical Headlight System with Camera-Driven Adaptive Driving Beam Control
VARROC LIGHTING SYSTEMS S.R.O, 2019
An arrangement and method for producing an asymmetrical, glare-free high-beam for vehicle headlights, comprising a front camera connected to an Adaptive Driving Beam (ADB) control unit that transmits information about oncoming and preceding vehicles. The headlights are asymmetrically designed to generate an ADB illumination area only for the vehicle's own lane, while the oncoming lane is illuminated with standard low-beam and high-beam. The ADB function is selectively enabled for the own lane based on camera detection of oncoming or preceding vehicles, while the oncoming lane remains in standard low-beam and high-beam mode.
10. Vehicle Headlight Control System with Dynamic Beam Adjustment Based on Relative Speed and Angle Detection
STANLEY ELECTRIC CO LTD, 2019
A controlling device, vehicle headlight system, and method for adaptive light distribution to suppress glare to oncoming vehicle drivers. The invention addresses delays in conventional camera-based detection systems that cause prolonged dazzling due to processing intervals. The solution features a shielding range derivation part that obtains movement information (e.g., angular velocity ω from sequential position detections via camera) of the oncoming vehicle and predicts its future position to derive an expanded shielding range in the beam pattern. A light distribution controller then dynamically adjusts the headlight output (e.g., via matrix LEDs, MEMS scanning, or segmented high/low beams) to block or dim light precisely in that range. This predictive approach enables faster, proactive anti-glare response, improving safety and visibility in dynamic traffic scenarios as an enhancement to ADB system
11. Vehicular Headlamp with Reflective Shade and Forward-Extending Reflection Body
EXCELLENCE OPTOELECTRONICS INC, EXCELLENCE OPTOELECTRONICS LTD, 2019
A vehicular headlamp with an improved shade element featuring reflective portions to enhance light utilization and beam pattern quality. The invention addresses inefficiencies in conventional shades that block light wastefully. The core solution integrates a shade (fixed to the reflector) with a reflection body having reflective surfaces oriented to redirect intercepted light rays originally destined for cutoff towards the road surface or desired illumination zones. This reflective redirection increases overall luminous flux efficiency, sharpens the cutoff line for better glare control, and improves low-beam visibility without additional light sources or complex optics, providing a cost-effective enhancement for projector-type headlamps in meeting regulatory and performance requirements
12. Vehicle Headlight Anti-Glare Device with Movable Shading Plate and Motor-Driven Transmission Mechanism
Valeo Lighting Hubei Technical Center Co., Ltd., 2019
Anti-glare adjusting device for vehicle headlights that can adaptively adjust the anti-glare effect without human intervention. The device has a movable shading plate that blocks light when driven to partially cover the headlight opening. This creates a cut-off light pattern to prevent dazzling. The shading plate can translate between fully open and partially closed positions. It links to a rotating transmission plate driven by a motor. The shading plate movement is restricted by stops. This allows adjustable anti-glare without fully blocking light when not needed. The device can be integrated into headlights or retrofitted.
13. Vehicle High-Beam Device with Light-Shielding Plate for Glare Reduction
HUA DINGMO, 2018
A vehicle high-beam device that reduces glare to oncoming drivers while maintaining high-beam functionality. The device features a light source body, a parabolic or semi-oval reflective bowl, and a light-shielding plate with a matte surface facing the light source. The light-shielding plate is positioned near the focal point of the reflective bowl to redirect light away from the upper portion of the bowl, where glare is most pronounced. This design prevents direct glare to oncoming drivers and reduces the risk of visual errors and accidents caused by high-beam misuse.
14. Vehicle Front Lighting Assembly with Lens and Beam-Configuring Support for Glare-Free Illumination
REGNER & ASOCIADOS SL, 2018
Front lighting assembly for vehicles that provides glare-free illumination without the use of reflectors. The assembly uses a lens and a light source with a support piece between them. The support has a beam configuration feature that partially obstructs the light path. This shape modification helps prevent light dispersion and maintains the beam angle, eliminating the need for adjustable reflectors. The assembly aims to provide effective, fixed anti-glare lighting for vehicles that does not require frequent realignment or maintenance.
15. Headlamp System with LED-Based Reflective Element Detection and Occlusion
VALEO VISION, 2017
A partitioned blind system for selective suppression of vehicle headlight glare experienced by the driver. The invention relates to the problem of strong oncoming headlight glare impairing visibility while weaker signals like traffic lights must remain observable. The core solution features a driver-viewing blind (e.g., visor or windshield-mounted) divided into multiple independent partitions: one dedicated to blocking intense headlight glare and another for preserving view of traffic lights or other dimmer elements. A controller independently adjusts each partition's opacity or position based on detected light conditions (e.g., via sensors), enabling customized, selective glare reduction without uniformly darkening the view. This approach enhances nighttime driving safety by maintaining critical visual information while effectively mitigating dazzle from headlights, offering a non-headlamp-based, in-cabin anti-glare alternative to adaptive vehicle lighting systems
16. Partitioned Blind System for Selective Vehicle Glare Suppression with Independent Light Condition Control
WU XIGENG, WU YUNXIAO, 2017
A partitioned anti-glare device and system for suppressing strong oncoming headlight glare while preserving driver visibility of road conditions and signals. The invention divides the driver's observation shield (e.g., visor, windshield section, or eyeglass-like catch) into at least two independent subregions: one dedicated to blocking or attenuating intense oncoming vehicle headlights, and another for clear observation of traffic lights, signs, or road details. A controller dynamically adjusts each subregion's light transmission state (e.g., opacity or dimming via high-frequency control >50Hz to prevent flicker), based on detected glare conditions. The system optionally integrates with LED headlamps for coordinated luminance adjustment, providing targeted, selective glare reduction without uniform darkening of the view. This in-cabin solution enhances nighttime safety as a non-headlamp-based alternative to adaptive vehicle lighting
17. LED Headlamp System with Sensor-Controlled Overlapping Beams and Vertical Light-Dark Boundaries
HELLA KGAA, 2016
A lighting system for headlamps that provides glare-free high beam functionality using LEDs and sensors. The system dims or turns off LEDs based on sensor data to avoid blinding oncoming traffic. The LEDs project multiple overlapping beams with vertical light-dark boundaries. This creates a wider, graded beam that reduces glare compared to a single wide beam. The LEDs are arranged in fields and segments to achieve desired light distribution. The system adjusts LED intensity and phasing for target identification. It uses flickering to highlight obstacles. The overlapping beams with vertical boundaries provide glare-free high beam illumination.
18. Projector-Type Vehicle Lamp with Mirror Member for Controlled Light Distribution
KOITO MANUFACTURING CO LTD, 2014
A projector type vehicle headlamp system enhancing roadside pedestrian visibility while preventing glare to oncoming or preceding vehicles. The invention features a projector lamp with a light source, reflector, and projection lens, combined with a specialized light distribution control mechanism. The solution employs an optical element or shade configuration that directs additional light toward the roadside (e.g., shoulder or pedestrian areas) to illuminate potential hazards more effectively, while maintaining a sharp horizontal cutoff and controlled upward light to avoid dazzling other road users. This approach improves low-beam peripheral illumination for safety without increasing overall intensity or requiring complex adaptive electronics, providing a cost-effective enhancement to conventional projector headlamps for better detection of pedestrians and obstacles at the road edge.
19. Headlight System with LED Arrays and Object-Based Glare Control Mechanism
Hella KGAA Hueck & Co., 2014
A vehicle headlamp system for generating an adaptive light beam that illuminates the road ahead while selectively reducing glare to detected objects such as oncoming vehicles, preceding vehicles, or pedestrians. The invention integrates an LED array as the light source with projection optics to form a controllable high-beam pattern. A detection device (e.g., camera or sensor) identifies objects in the forward area. The solution dynamically dims or deactivates specific LEDs corresponding to the object's position in the beam pattern, creating localized dark zones or reduced intensity areas to prevent dazzling without significantly compromising overall road illumination. This pixelated LED approach enables precise, real-time adaptive driving beam (ADB) functionality for enhanced safety and glare-free high-beam use in dynamic traffic conditions
20. Vehicle Headlamp System with Predictive Light-Blocking Based on Oncoming Vehicle Movement Detection
STANLEY ELECTRIC CO LTD, 2013
A headlamp system for a vehicle that prevents glare to oncoming vehicles by predicting their movement direction. The system uses a camera to detect the position and movement direction of the oncoming vehicle, and adjusts the headlamp's light-blocking range accordingly. This anticipatory approach enables the system to prevent glare even when the relative positions of the vehicles change, such as when the oncoming vehicle changes lanes or navigates a curve.
21. Headlamp with Shade-Based Light Distribution Pattern Switching and Glare Prevention Mechanism
KOITO MANUFACTURING CO LTD, 2011
Vehicle headlamp capable of changing light distribution patterns by switching shades, with a mechanism to prevent glare during switching operations by precisely controlling shade movement and light shielding areas. The headlamp features a unique shade arrangement where frequently used patterns are positioned at the focal point, and a dedicated actuator system enables rapid and accurate switching between patterns. The system also incorporates a glare prevention mechanism that ensures adequate light shielding during pattern changes, particularly when transitioning between high and low beam patterns.
22. Headlamp System with Controllable LEDs and Object Detection for Dynamic Glare-Free Illumination
HELLA KGAA HUECK & CO, 2011
A system for producing a glare-free high beam in the front area of a motor vehicle, comprising a headlamp with separately controllable LEDs, an object detection device, and a positioning device. The system determines the position of detected objects and adjusts the illuminance distribution of the headlamp to prevent glare, with options for distinguishing between oncoming and following vehicles. The system also accounts for the time required to detect, position, and adjust the illuminance distribution to ensure a smooth transition to glare-free operation.
23. Vehicular Headlamp with Selective Liquid Crystal Shutter for Glare Reduction
KOITO MFG CO LTD, 2011
A vehicle lamp system with overlapping light distributions and a customized light source-reflector arrangement for improved illumination control and reduced glare. The invention features multiple light sources (e.g., LEDs or bulbs) paired with reflectors that produce partially overlapping beam patterns, creating a composite light distribution with enhanced uniformity and cutoff precision. The core solution optimizes reflector geometry and source positioning to achieve sharp horizontal/vertical cutoffs while directing light efficiently toward the road, minimizing stray light upward or toward oncoming traffic. This configuration enhances low-beam performance, reduces dazzle to other road users, and improves overall visibility without complex adaptive mechanisms, serving as a cost-effective enhancement for conventional headlamps in meeting glare regulations and safety standards
24. Vehicle Lamp with Overlapping Light Distribution and Custom Light Source-Reflector Arrangement
HYUNDAI MOBIS CO LTD, 2025
A vehicle lamp designed for enhanced light distribution and control in automotive lighting applications. The invention focuses on an improved lamp structure (likely a headlamp or auxiliary lamp) incorporating specific optical elements, light sources, and housing/reflector configurations. The core solution optimizes beam pattern formation potentially through segmented or directed emission to achieve better forward illumination, uniformity, and cutoff precision while minimizing stray light and glare to oncoming traffic or pedestrians. This design provides efficient, regulatory-compliant performance with potential adaptive or static features for improved visibility and safety, serving as a cost-effective advancement in conventional vehicle lamp technology without relying on complex matrix/ADB systems.
25. Vehicle Headlight with Dual Light Distribution Patterns and Dynamic Intensity Adjustment
KOITO MANUFACTURING CO LTD, 2025
A vehicle headlight that improves visibility while reducing glare for oncoming vehicles. The headlight has two distinct light distribution patterns - one below the cutoff line and another along the cutoff line. The lower pattern provides normal illumination. The upper pattern overlaps the cutoff line and is adjusted in intensity based on the position of an object outside the vehicle. This prevents glare from bright objects near the cutoff line. By separating the patterns and dynamically adjusting the upper one, the headlight provides good visibility without excessive glare.
26. Segmented Adaptive Headlight System with Selective Beam Deactivation and Intensity Adjustment
ZKW GROUP GMBH, 2025
A motor vehicle lighting system with at least two adaptive headlights for dynamic dipped beam (low beam) and adaptive full beam (high beam) distributions integrates adaptive headlights capable of producing standard low-beam patterns (AL) and variable high-beam patterns (FL) with selective shading. The solution enables real-time adjustment of light distribution via matrix LEDs, segmented arrays, or equivalent to create localized reduced-intensity zones toward detected oncoming/preceding vehicles or objects, minimizing glare while maximizing forward visibility. This multi-headlight coordinated approach ensures uniform, compliant illumination across scenarios like curves or traffic, providing robust adaptive driving beam (ADB) functionality as a safer, more precise alternative to static or simpler adaptive systems
27. Headlight System with Selective Light Dimming Based on Diffuse Reflection Detection
STANLEY ELECTRIC CO LTD, 2025
A headlight system that prevents glare for oncoming vehicles by selectively turning off or dimming light in areas where it will be reflected back and reach the oncoming driver. The system detects regions on the road surface where light is regularly and diffusely reflected to the oncoming driver's eyes, and turns off or dims the headlights in those areas to prevent glare. This addresses the issue of diffuse reflection from rough road surfaces that can still dazzle oncoming drivers even when direct glare is avoided.
28. Headlamp with Adaptive LED Pixel Control and Optical Elements for Variable Edge-Weighted Light Distribution
HELLA GMBH & CO KGAA, 2025
Headlamp design for vehicles that improves illumination of the edge regions outside the vehicle's path without blinding oncoming traffic. The headlamp has an adaptive light distribution that can shift the focal point to the edges instead of always centering it. This is achieved by controlling the LED pixels and optical elements in the lamp. The control signal adjusts the light spots and optics to create a fan-shaped illumination pattern with progressively lower intensity further ahead. This concentrates brightness in the edges where it's needed, like sidewalks, while keeping the center less intense to avoid glare. The edge regions have isolines of equal illumination angled to the horizontal. The boundary between edge and main beam is adjusted based on vehicle track detection to favor illumination outside the lane.
29. Vehicle Windshield with Electrically Adjustable Nanostructured Polarizing Zones for Dynamic Light Attenuation
ADEIA GUIDES INC, 2025
Dynamic attenuation of light transmissibility of localized portions of a vehicle windshield to reduce glare without relying on polarizing filters on other vehicles' headlights. The windshield has a polarizing layer with nanostructures that can change phase when voltage is applied. Cameras detect light sources and occupant positions. The windshield zones corresponding to headlights are activated to attenuate light there. This reduces glare without requiring other vehicles to have polarizing filters. The windshield zones can also be adjusted based on camera data to account for interior light sources.
30. Vehicle Lamp with Optical Path Adjustment and Lens Parameter Ratio Variation
SL CORP, 2025
An optimized vehicle lamp configuration for inherent glare prevention to oncoming or preceding vehicles without added physical shields or mechanical complexity. The invention refines optical elements including reflector geometry, light source arrangement, and beam-forming components to generate a precise beam pattern with sharp horizontal/vertical cutoffs and reduced stray light. The solution directs illumination efficiently to the road while suppressing upward/lateral spillover that causes dazzle in opposing lanes or to other road users. This passive design achieves uniform, regulatory-compliant performance and effective glare reduction, providing a simple, cost-effective enhancement over active ADB, matrix LED, or motorized adaptive systems in standard headlamps
31. Illumination Apparatus with Shielded Lens System for Controlled Beam Spread
KYOCERA CORP, 2025
An illumination apparatus optimized for glare-free, uniform light emission in compact lighting applications, such as vehicle headlamps or spotlights. The invention integrates a housing with a light source, lens system, and a shield featuring a central opening. The core solution forms a real image of the light source near or at the shield's opening via the lens, with imaging magnification ≤ the opening size ratio, limiting the emission divergence angle (θ1 < source-side angle θ0). The shield's inclined surfaces (reflective or absorptive) and optional light reducers (absorptive films, protrusions/recesses on walls) suppress reflection-scattering stray light. This precise optical control minimizes edge scattering, internal reflections, and outward glare while ensuring efficient, narrow-beam output, providing a compact, cost-effective enhancement for high-quality, dazzle-reduced illumination over conventional designs
32. Vehicle Headlight Lighting Unit with Independent Switchable Light Source and Optical Assembly for Controlled Overhead Illumination
MARELLI AUTOMOTIVE LIGHTING REUTLINGEN GMBH, 2025
A lighting unit for a vehicle headlight that provides proper overhead illumination without glare in adaptive driving beam (ADB) mode. The unit has an independent switchable light source and an optical assembly to deflect the light. When the main ADB headlight shades the overhead area, the separate light source is activated to illuminate the overhead with a defined, spatially limited area above the cutoff line. This prevents glare while maintaining minimum overhead illumination.
33. LED Lens with Cylindrical Entry, Tapered Sidewall, and Compound Parabolic Concentrator for Enhanced Color Mixing and Glare Control
LUTRON TECHNOLOGY COMPANY LLC, 2025
LED lens for improved color mixing and glare reduction. The lens has a cylindrical entry with a tapered sidewall and diffusion treatment near the LEDs. This collimates some light while mixing colors. The outer region has a straight sidewall and no diffusion. It diffuses and scatters light as it exits the lens. This surrounds the collimated inner light to give better mixed output. The lens shape is a compound parabolic concentrator (CPC) with a concave exit. This concentrates light from the side while spreading it from the center. The CPC also helps reduce glare by internally reflecting light back into the lens. The lens can be used in LED lighting applications to improve color rendering and reduce glare compared to conventional collimating lenses.
34. Vehicle Headlight and Window System with Synchronized Flickering and Shuttering Mechanism
ADEIA GUIDES INC, 2025
Reducing glare for vehicle occupants caused by headlights of oncoming vehicles by coordinating the flickering of headlights and shuttering of windows between vehicles. When multiple vehicles receive a common signal, they derive a synchronized clock signal based on it. Vehicles then alternate between high and low window transparency and headlight intensity according to the clock. This allows vehicles to use high intensity headlights while reducing glare for occupants of opposing vehicles by coordinated flickering.
35. Vehicle Lighting System with Dual Laser Sources and Scanning Mirrors Converging on Shared Phosphor Plate
STANLEY ELECTRIC CO LTD, 2025
A vehicle lighting system that improves headlight brightness and reduces glare by using lasers and scanning mirrors. The system has two laser sources, two scanning mirrors, and a shared phosphor plate. The lasers are scanned and converge at the phosphor plate. This allows longer optical paths through the brightness correction lenses to improve brightness. The lasers intersect at the phosphor plate with one hitting the lower region and the other hitting the upper region. This distributes the lasers over more of the phosphor plate for better brightness correction.
36. Robust optical design of high-contrast vehicle headlamps with cylindrical lens array and inverted triangular beam pattern
chishou wu, ivan moreno, c s c liu - Nature Portfolio, 2025
Headlamps are essential for safe night driving, as they must provide sufficient brightness to illuminate the road while minimizing glare other drivers. Designing low-beam optics is more complex than general lighting due need a high-contrast cutoff line, with brightest point positioned near its edge. This challenge becomes even greater when working compact optical systems. In this paper, we propose robust design address issue effectively. We develop bicycle headlamps using cylindrical lens array (CLA) combined reflective create specialized light pattern. The CLA spreads pattern horizontally form line; however, alone does not ensure optimal performance. To overcome limitation, introduce novel principle: generated by reflector, before passing through CLA, should be inverse-triangular or trapezoidal. approach enables shift upward and closer solving key in previous designs.
37. Adaptive Freeform Optics Design and Multi-Objective Genetic Optimization for Energy-Efficient Automotive LED Headlights
shaohui xu, xing peng, ci song - Multidisciplinary Digital Publishing Institute, 2025
In addressing the design imperatives of automotive headlight miniaturization and energy conservation, this paper puts forth a methodology for vehicle lighting systems that is predicated on free surface optics an intelligent optimization algorithm. The establishment mapping relationship between light source target relevant performance standards. numerical calculation then integrated with MATLAB R2022a to obtain free-form coordinate points establish three-dimensional model. To optimize parameter design, genetic algorithm employed fine-tune max, thereby attaining optimal max strikes balance volume luminous efficiency. experimental results demonstrate by integrating incidence angle into high beam low beam, final simulation show optical efficiency 88.89%, 89.40%. This enables headlamp system achieve lamp framework proposed in study provides reference compact system.
38. Vehicle Lamp with Concealed Concave Mirror for Controlled Light Projection
MURAKAMI CORP, 2025
Vehicle lamp design that reduces the visibility of scattered light from the lamp to prevent glare for pedestrians and drivers. The lamp projects light onto the ground beside the vehicle using an optical system with a concave mirror. The mirror position is set so that the lower part of the mirror is higher than the window. This hides the lower part of the mirror from view when the lamp is mounted on the vehicle. This prevents scattered light from the mirror being seen. The upper part of the mirror reflects the light downward through the window. This reduces the chance of scattered light from the mirror being visible to people around the vehicle.
39. Light Emitting Module with Angled Wavelength Converters and Narrow Spacing for Adaptive Driving Beam Systems
SEOUL SEMICONDUCTOR CO LTD, 2025
Light emitting module for headlamps with reduced glare and improved dark zone control in adaptive driving beam (ADB) systems. The module uses wavelength converters on top of the LED chips with angled sidewalls of 80 degrees or less. The converters have narrow spacing, 100 microns or less, and their edges have low luminance. A white wall surrounds the LEDs and converters. This configuration prevents light leakage between converters and reduces glare compared to flat converter edges. It allows precise dark zone control for ADB headlamps without excessive light emission.
40. LED Headlight Retrofit Lamp with Dual-Color Temperature LEDs for Directional Light Emission
LUMILEDS LLC, 2025
LED headlight retrofit lamp that reduces glare and improves visibility compared to conventional LED headlights. The lamp has two LEDs, one on each side, with different color temperatures. The higher temperature LED emits light towards oncoming traffic while the lower temperature LED illuminates the road. This separates glare from high temp light for oncoming drivers and better visibility from lower temp light for the driver's own use.
41. Dynamic Headlight Lighting Area Adjustment via Pressure-Controlled Astigmatism Modulation
AVITA TECHNOLOGY CHONGQING CO LTD, AVITA TECHNOLOGY CO LTD, 2024
Method to dynamically adjust the lighting area of vehicle headlights using a pressure control device and astigmatism agent in the headlight housing. The method involves delivering astigmatism to the housing when headlights are turned on to increase light spread angle. This prevents excessive lighting that can blind other drivers. The astigmatism is removed when the lights are off to reduce spread angle. An MCU controls the pressure device to manage astigmatism delivery and removal.
42. Automotive Headlight with Symmetric Reflective Device and Concave Cutoff Line Formation
CHANGZHOU XINGYU AUTOMOTIVE LIGHTING SYSTEMS CO LTD, 2023
An automotive headlight with improved low beam cutoff line and increased 75R illumination. The headlight uses an optical system with an LED source, reflective device, and lens. The reflective device reflects the LED light forward and the lens focuses it. The cutoff line is formed by an inwardly concave corner on the illumination area. This creates a bright and dark low beam without dazzling oncoming drivers. The reflective device is symmetrically arranged around the LED to increase light usage.
43. LED Optical System with Converging Light Concentrator and Large-Area Reflector for Beam Shaping
ZHUHAI SHUILIFANG LIGHTING TECH CO LTD, ZHUHAI SHUILIFANG LIGHTING TECHNOLOGY CO LTD, 2023
LED optical system that provides glare-free lighting with high efficiency and brightness. The system uses a converging light concentrator and a large-area reflector to shape the light beam. The LEDs emit into the concentrator which focuses the light into a narrow beam. This beam is then reflected off the large reflector into a wider, dispersed beam. The converged beam does not intersect the dispersed beam, preventing glare. This allows bright, focused light from the LEDs without causing discomfort or disability glare. The concentrated light improves efficiency compared to diffused lamps.
44. Automobile Outdoor Lighting Device with Vertically Adjustable and Rotatable LED Panels in Frosted Glass Housing
Cao Yizhe, CAO YI-ZHE, 2023
Outdoor lighting device for automobiles with low glare to provide efficient lighting without causing discomfort to the eyes of surrounding users. The device has a lamp housing with a frosted glass cover over the equipment box. Inside the box, frames slide vertically on rails with LED panels fixed between them. The frames in the middle have control panels. A double-headed screw connects the frames and slides. This allows the LED panels to move vertically and rotate slightly to adjust the light distribution. The frosted glass cover reduces glare. The device can also have photovoltaic panels on the roof to charge internally.
45. Vehicle Headlights with LED and Mirror Arrays for Adaptive Beam Pattern Control
MAXELL LTD, 2023
Variable light distribution for vehicle headlights using LED arrays and mirror arrays to provide adaptive beam patterns for different driving conditions. The headlights have an LED array, a mirror array in front of it, and a projection lens. The mirror array can be driven to change the light path. In one configuration, a central mirror and outer mirrors reflect light from the LEDs through the projection lens to focus on-center. This provides central concentration without blocking. In another configuration, outer mirrors reflect to center for high beam intensity. The mirrors can also swivel for road inclination compensation.
46. Vehicle Headlamp with Dual Light Sources and Optics for Low Beam Zone III Formation Without Shutter
LUMILEDS LLC, 2023
A vehicle headlamp that provides proper low beam illumination, including a zone III beam, to avoid glare for oncoming drivers without using a shutter. The headlamp has two light sources—one for low and one for high beams. Optics shape the beams from each source. The low beam optics have two parts—one redirects light below the cutoff line, and the other redirects light above the cutoff to create a zone III beam.
47. Automotive Lighting System with Pulsed LED Headlamp and Adaptive Light Valve Mechanism
JIA JIANHUA, 2023
Dual-purpose automotive lighting system that provides non-glare illumination for night driving. The system uses a lighting electronic information system, a light valve like a sun visor or glasses, a photoreceptor, and an LED headlamp. The system pulses the headlamp between on and off states at millisecond intervals. The light valve can block or allow light based on signals from the system. This rapid pulsing prevents driver discomfort and glare without affecting visibility.
48. Road Lighting Device with Flat Cut-Off Lens and LED Light Source for Controlled Light Distribution
THE GOOD LIFE CO LTD, 2022
Road lighting device with a flat cut-off lens that prevents glare and improves visibility for drivers. The device has a housing, LED light source, and a lens with cut-offs to shape the light distribution. The lens cuts off the horizontal and upper vertical light to prevent glare for oncoming drivers. The lower vertical light illuminates below eye level to avoid reflection. This prevents glare, reduces obstructed views, and uniformly lights the road without causing driver stress or fog reflections.
49. Vehicle LED Headlight System with Adjustable Inner Shell and Dual-Sided Reflectors
WANG XIANLEI, 2022
Intelligent control system for LED headlights in vehicles that improves light distribution and avoids glare. The system uses a unique inner shell design with reflectors on both the ellipsoidal and circular sides of the headlight. The inner shell has mechanisms to adjust the position of the LED lamp relative to the reflectors. When a high beam approaches, the inner shell moves to focus the light better. This enhances illumination on the sides while reducing glare in the middle. The system also has a light sensor to detect high beams and adjust the lamp position accordingly.
50. LED Vehicle Headlight with Dual-Chamber Reflective Bowl and Light-Transmitting Plate
TAIZHOU YIWEI AUTOMOBILE TECH CO LTD, TAIZHOU YIWEI AUTOMOBILE TECHNOLOGY CO LTD, 2021
LED reflective headlight for vehicles that improves light distribution and reduces glare compared to conventional reflective headlights. The headlight has a mounting bracket with an LED source, a reflective bowl, and a light-transmitting plate. The plate collects and refracts light that doesn't hit the bowl to improve uniformity. The reflective bowl has upper and lower chambers with LEDs to separate high and low beams. This allows using the full LED output instead of blocking some like conventional reflectors. The divided bowl and light-collecting plate provide better light distribution and glare reduction compared to a single reflector.
The advances presented here show a great deal of advancement in the field of glare-reducing automobile lighting systems. These developments make driving at night safer for all drivers and improve visibility, which lowers the number of accidents.
Get Full Report
Access our comprehensive collection of 77 documents related to this technology
