Anti-Glare Systems in Automotive Headlights

Vehicle lamp that reduces glare to oncoming vehicles when the host vehicle is turning. The lamp lowers the emission direction of the low beam light distribution pattern when a turning vehicle has an oncoming vehicle in front. This lowers the cutoff line of the low beam light uniformly, reducing glare to the oncoming vehicle even if some light from the host vehicle's lane also goes into the opposing lane. The lamp can physically move the optical unit vertically using a motor to achieve the directional adjustment.

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The high risk of glare from vehicle headlights at night often becomes a significant contributor to traffic accidents, particularly for motorcyclists and drivers lightweight vehicles. To address this issue, smart glare-blocking system based on PDLC (Polymer Dispersed Liquid Crystal) film has been developed. This research proposes the design, development, testing integrated with an LDR (Light-Dependent Resistor) sensor automatically detect light intensity adjust film's opacity in real-time. goal is enhance driver visibility comfort without compromising overall road safety. experimental setup involved placing prototype varying distances (09 meters) controlled source night. Measurements were conducted collect data intensity, voltage output, resistance LDR, degree attenuation achieved by film. results showed that distance 1 meter, could block up 99.85% incoming light, reducing 12080 Lux only 17 Lux. Moreover, began react 6 meters output 34V. It became fully transparent 89 50V. findings demonstrate functions effectively detecting potential its impact before it reaches driver's eyes. ... Read More

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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.

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Method for controlling a motor vehicle headlamp to reduce glare effects, comprising determining a glare reduction range based on an angle and a correction value, wherein the correction value is independent of the total distance between the object and the vehicle, and the glare reduction range is U-shaped with a lower edge extending horizontally and side edges extending vertically.

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A vehicle headlight system that prevents glare by dynamically adjusting the beam pattern. The system includes a primary optical structure with a light-shielding element that creates a cut-off line in the high-beam pattern. The cut-off line is positioned on the left or right side of the beam, depending on the vehicle's position. The system also includes a mechanism to move the cut-off line left or right to adjust the beam pattern and prevent glare. The system can be implemented in a single headlight or in a dual-headlight configuration, where the left and right headlamps are synchronized to create a combined beam pattern with a dark zone in the center.

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Vehicle headlight system with controllable glare reduction, comprising a light source and a segmented light guide device with liquid crystal material between transparent substrates. The device has segments that receive light from the source and can be selectively controlled to operate in either an anti-glare output state or a different output state, allowing for dynamic glare reduction in specific areas of the light pattern.

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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 operation and glare prevention.

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A method for glare control of objects by a vehicle's headlight system, comprising determining the positions of two objects in a camera image that reflect light from the headlight, and controlling the headlight to reduce glare in the image sections corresponding to these objects, as well as the connecting area between them.

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A method for reducing headlight glare experienced by a vehicle driver, comprising: illuminating the environment with headlights; obtaining image data of the illuminated environment; analyzing the image data to identify reflective surfaces that may cause glare; categorizing the identified reflective surfaces into at least two categories; and adjusting the light output from the headlights in the direction of each identified reflective surface based on its category.

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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.

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A vehicle headlight control system that suppresses glare to oncoming vehicles by dynamically adjusting the headlight beam based on the relative speed and angle between the host vehicle and the oncoming vehicle. The system uses camera data to calculate the oncoming vehicle's movement information and derives a shielding range to block light from reaching the oncoming vehicle. The shielding range is dynamically adjusted based on the relative speed and angle to ensure optimal glare suppression while maintaining a clear field of vision for the oncoming vehicle's driver.

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A vehicular headlamp with improved light distribution and reduced glare. The headlamp features a shade with reflective portions, including a forward-extending reflection body with inclined reflective and supplemental light planes. The reflection body redirects light to enhance the main beam while minimizing glare on the opposite lane. The shade's reflective surfaces work in conjunction with the reflector to optimize light distribution and intensity.

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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.

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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.

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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.

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Vehicle headlamp system that mitigates glare by detecting and occluding reflective elements in the illuminated scene. The system uses LEDs in the headlamp to both emit light and detect reflected light sources, such as raindrops or snowflakes, through a process of alternating emission and detection. The headlamps are synchronized to ensure coordinated operation, allowing for rapid correction of the light beam to prevent glare.

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Device and system to suppress vehicle glare using partitioned blinds that can selectively block strong headlight glare without impairing visibility of weaker traffic lights. The system has a driver viewing blind with multiple partitions, one for suppressing headlight glare and another for observing traffic lights. A controller can independently control the blinds based on light conditions. This allows customized glare reduction that preserves visibility of both headlights and traffic lights.

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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.

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A projector-type vehicle lamp with enhanced visibility for pedestrians at the roadside without glare to oncoming or preceding vehicles. The lamp features a mirror member with an upward reflecting surface positioned to reflect light from the reflector towards the projection lens. The mirror's front edge is designed to extend along the meridional image surface of the projection lens, with left and right end portions displaced forward or backward to create distinct cut-off lines. This configuration enables clear visibility of pedestrians while preventing glare to other drivers.

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A system for producing a glare-free high beam in a vehicle's headlights using LED arrays and object detection. The system has a headlamp with separately controllable LEDs, an object detection device, and a positioning device to determine object locations relative to the vehicle. It divides detected objects into subgroups like oncoming vehicles vs. vehicles ahead, then sets each subgroup's glare-critical angle ranges and illuminance limits. The LEDs are dimmed as needed to avoid exceeding the limits for detected objects.

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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.

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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.

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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.

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A projector-type vehicular headlamp with a liquid crystal shutter that prevents glare for oncoming drivers during rainy weather while maintaining sufficient low-beam brightness. The liquid crystal shutter has a liquid crystal member disposed only in specific areas between transparent plates, with polarization plates covering only the outer surface corresponding to these areas. The shutter's first area blocks reflected light to form the low-beam pattern, while its second area blocks light reflected from the road surface to prevent glare above the cut-off line.

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A vehicle lamp design that minimizes the sense of disconnection in slim lamps and reduces glare while meeting regulations. The lamp uses overlapping light distribution patterns formed by a custom arrangement of light sources and reflectors. The distances between the sources, reflectors, and lens focal points are different to create separate patterns. This allows continuous lighting without disjointed boundaries. Narrowing the high-illumination area and adding low-illumination light improves hot zone coverage without glaring. The convex lens shapes prevent light splash.

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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.

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Glare-free adaptive headlights that reduce the risk of dazzling oncoming vehicles. The system has multiple segmented adaptive headlights that can switch between dipped and full beam. Cameras detect nearby road users and compare their positions to the headlight segments. If a road user is in a segment that would normally be full beam, it disables that segment to prevent glare. Additionally, if a road user is in the sign light region, it reduces the sign light intensity. This prevents glare from both full and sign lights when road users are nearby.

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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.

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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.

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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.

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Vehicle lamp design to improve beam pattern and reduce glare without additional shields. The lamp has a light source, an optical path adjustment unit, and an optical unit with multiple incident and exit lenses. The key difference is that the ratio of lens parameters like focal length between the exit and corresponding incident lens is different for some lenses compared to others. This allows optimizing light distribution and preventing glare without needing additional shields.

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An illumination apparatus with shielding to control beam spread and reduce glare. The apparatus has a housing, a light source, a lens system, and a shield. The light source emits light into the housing. The lens forms an image on an internal plane. The shield is between the light source and housing opening. It has an opening to allow light to pass. The outermost beams of the light spread less after passing through the shield opening compared to before. This reduces beam spread and glare.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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