Anti-Glare Systems in Automotive Headlights
58 patents in this list
Updated:
Modern vehicle headlamps can produce luminous intensities exceeding 100,000 candela, creating significant glare hazards for oncoming traffic. Field studies show that even brief exposure to high-intensity headlamps can temporarily reduce visual acuity by up to 60% and increase recovery times to over 3 seconds—a critical safety concern at highway speeds.
The fundamental challenge lies in maximizing forward illumination for the driver while preventing disabling glare for other road users across varying environmental conditions and traffic scenarios.
This page brings together solutions from recent research—including adaptive LED arrays with selective dimming, dynamic beam pattern control, supplemental curve lighting, and intelligent glare-free high beam systems. These and other approaches focus on practical implementations that balance visibility, safety requirements, and manufacturing feasibility.
1. LED Floodlight with Revolving Reflective Bowl and Modular LED Units
蒋建华, JIANHUA JIANG, 2024
LED floodlight with adjustable beam pattern and modular design for easier replacement and adjustment compared to fixed floodlights. The floodlight uses a novel LED module with a revolving reflective bowl, lens, and LED unit. The bowl inner wall rotates around the LED center, forming a curved surface with reflective prisms that deflect the light. This provides a uniform, glare-free beam. The modules can be easily replaced and adjusted by sliding them into fixed slots on the floodlight frame. The floodlight also has a removable junction box for power connections.
2. 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.
3. 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.
4. 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.
5. Automobile Outdoor Lighting Device with Vertically Adjustable and Rotatable LED Panels in Frosted Glass Housing
曹奕哲, 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. Vehicle Headlight System with Pivotable Rotating Reflector for Beam Pattern Adjustment
JIANGSU KANGSHUN INTELLIGENT MANUFACTURING CO LTD, JIANGSU KANGSHUN INTELLIGENT MFG CO LTD, 2022
Adaptive intelligent high beam control system for vehicles that allows adjustment of the beam pattern to provide better illumination without blinding oncoming traffic. The system uses a rotating reflector mounted on the headlight housing that can pivot vertically and horizontally. This allows the beam to be aimed up or down and left or right to direct the light where needed. The reflector rotates in response to signals from a central vehicle control system. This enables dynamic adjustment of the beam shape to avoid glare for oncoming drivers while still providing optimal illumination on the road ahead.
11. 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.
12. Highway Lighting System with LED Arrays Featuring Gradual Transition of Horizontal and Vertical Angles
NANTONG YOUTONG CONSTRUCTION TECH CO LTD, NANTONG YOUTONG CONSTRUCTION TECHNOLOGY CO LTD, 2022
An anti-glare supplementary lighting system for highways that reduces driver discomfort and improves safety by gradually transitioning light levels and angles. The system uses LED lights arranged on the side of the road at regular intervals. The lights have decreasing horizontal angles and low vertical angles as you drive by. This gradual dimming and angled positioning prevents glare and allows drivers to adapt to changing brightness levels.
13. 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.
14. 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.
15. Lighting Module with Fixed-Grid LED Array and Beam-Shaping Optical Elements
VOSSLOH SCHWABE DEUTSCHLAND GBMH, VOSSLOH-SCHWABE DEUTSCHLAND GBMH, 2021
A lighting module for focused illumination of surfaces or objects without glare. The module has a carrier with multiple LED light sources arranged in rows with fixed spacing. The LEDs are surrounded by optical elements that shape the emitted light into a focused beam. This allows directing the light precisely where needed without spilling light outside the intended area. The fixed grid layout ensures consistent light distribution and uniformity.
16. LED Vehicle Lamp Module with Steerable Lamp Post and Integrated Laser Sensors
UNIV ZHEJIANG, ZHEJIANG UNIVERSITY, 2021
LED vehicle lamp module with adaptive lighting to improve safety by avoiding glare and providing sufficient illumination without blind spots. The module has a housing, protective cover, light collecting cover, stepping motor, lamp post, LED bulbs, and laser sensors. The light collecting cover is fixed to the housing sides with the motor base on one side and the laser sensor on the other side. The stepping motor rotates the lamp post to steer the LEDs, while the lasers measure distance. This allows the lights to adaptively avoid objects in the lane without turning off all lights like traditional high beams, providing better illumination without glare.
17. LED Lamp with Integrated Anti-Glare Optical Structure and Uniform Light Distribution
ZHONGSHAN GR OPTICS CO LTD, 2021
LED lamp with anti-glare and uniform lighting. The lamp has an LED optical structure that prevents glare and allows direct viewing while still providing good light output. The optical structure consists of a light source holder, a lens holder, a lens body, and an anti-glare spot optimizer. The optimizer is fixed to the lens body using a middle groove and holder. This configuration allows the optimizer to block excessive light and spread the beam more evenly, reducing glare and improving light quality.
18. Headlight System with Concave Lens and Reflectors for Directed Beam and Integrated Cooling and Swivel Mechanisms
SICHUAN ZHENHUA ELECTRICAL ENG CO LTD, SICHUAN ZHENHUA ELECTRICAL ENGINEERING CO LTD, 2021
An anti-glare headlight system for smart cars that reduces driver dazzle when encountering oncoming cars. The system uses a concave lens, reflectors, and a dispersing reflector to direct the headlight beam downward and forward instead of directly up. This prevents the light from reflecting off opposing vehicle headlights and dazzling the driver. The system also has a water cooling system with a pump, pipes, and fins to dissipate heat from the LEDs and extend lamp life. The headlight housing has a movable mounting plate for cleaning debris, and a dust box below. The headlight is fixed to the car body with a motorized swivel to aim the lights.
19. Vehicle Headlight with Adaptive Driving Beam for Dynamic Beam Pattern Adjustment
HYUNDAI MOBIS CO., LTD., 2021
Controlling the beam pattern of a vehicle headlight prevents glare for oncoming vehicles and improves visibility for pedestrians and animals. The headlight uses adaptive driving beam (ADB) technology to adjust the beam pattern based on object detection. When an opposing vehicle is detected, the headlight masks out that area to prevent glare. If a pedestrian or animal is detected, the headlight flashes around their boundaries to alert them without blinding them. This allows the vehicle to be spotlighted without causing discomfort or harm to others.
20. Projection Lamp with LED-Aligned Intercepting and Anti-Glare Optics and Integrated Mesh Grid
ZHONGSHAN XINYUANHONG OPTICAL CO LTD, 2021
An anti-glare, cut-off projection lamp with improved glare reduction and light containment compared to traditional floodlights. The lamp has an LED lamp group, intercepting optics with holes matching the LEDs, anti-glare optics with holes matching the intercepting holes, and a mesh grid. The LEDs are sandwiched between the optics and cover plate. The intercepting holes block some light, the anti-glare holes further reduce glare, and the mesh prevents stray light. This cooperative light routing controls the LED emission within a range to reduce glare and improve eye protection.
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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.