Cost-Efficient Automotive Lighting Design

Efficient tunnel lighting control to reduce energy consumption and costs in highway tunnels. The method involves dynamically adjusting the lighting based on vehicle traffic and environmental conditions. It uses sensors to monitor tunnel conditions and vehicle presence. When no vehicles are detected, some lights can be turned off. When vehicles are detected, the required number and brightness of lights are calculated based on the vehicle count. This optimizes lighting usage based on actual needs instead of keeping all lights on 24/7.

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Optimizing road lighting energy efficiency by dynamically adjusting lamp output based on actual road lighting needs and lamp aging. The method involves calculating lamp luminance decay over time, road illumination demand by time of day, and regulating lamp current to compensate for both factors. This allows optimized lighting levels while accounting for lamp aging and environmental effects.

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Tunnel energy-saving intelligent management system that optimizes tunnel lighting to reduce costs while ensuring safety. It uses real-time data from sensors like radar, cameras, and brightness collectors to dynamically adjust lighting levels. The system models the tunnel in 3D and simulates vehicle paths to optimize lighting based on traffic conditions. It also coarse adjusts lighting based on time and weather. The system integrates with existing tunnel infrastructure and sensors.

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Lighting control design support system that allows designers to calculate the initial cost of a lighting control system with different equipment control methods. The system acquires design information like number of fixtures, fixture cost, control device cost, distribution board cost, and construction cost. It calculates the initial cost when introducing the system based on these inputs. This helps designers compare costs for different control methods like dimming versus fixed output.

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A vehicle lighting device that can be produced inexpensively and flexibly is dimensionally stable and highly resistant to stress cracking. The device has a housing and a frame that are joined by plastic welding. The housing and frame materials are selected to resist stress cracking. The frame is molded onto a light panel using plastic injection molding, eliminating the need for annealing after joining.

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Compact, integrated, high precision headlight optical element for matrix LED headlights that reduces size, cost, and complexity compared to conventional headlight assemblies. The headlight optical element has a curved shape with protruding surfaces that integrates light entry, transmission, and emergence in sequence. It can be mounted in a simplified headlight module with a bracket, circuit board, radiator, and light adjustment mechanism. The compact, integrated design reduces parts, volume, and cost while maintaining optical precision. The headlight module can be arranged longitudinally, horizontally, or obliquely for versatility.

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Headlight optical element for matrix LED headlights that is small, compact, integrates multiple optical elements, simplifies mounting, and reduces cost compared to traditional matrix headlights. The headlight optical element has a curved light incident surface that protrudes backwards, followed by a curved light transmitting surface that protrudes forwards. This integrated design allows the headlight to have a smaller size, as the light sources are the only external components needed. The headlight module uses a bracket to hold the element, and connectors attach the circuit board and radiator. This simplifies assembly compared to separate optical elements. The compact size, integrated design, and fewer parts make the headlight more compact, easier to mount, and lower cost.

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Adaptive power driving for lighting systems that extends the life of capacitors and reduces power dissipation compared to traditional constant voltage lighting power supplies. The adaptive power driving involves dynamically adjusting the voltage and current supplied to the LEDs based on their actual requirements rather than providing a fixed voltage. This reduces excess power dissipation as heat since the LED driver voltage is tailored to the LED current demand. The technique involves analyzing the LED configuration and controlling switches to activate the LEDs during cycles while determining current requirements. This allows setting the LED driver current control point based on the calculated demand.

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Compact and efficient vehicle headlight module design that reduces size while maintaining lighting performance. The module has three parts arranged sequentially along the light path: a light collecting part, a reflection part, and a light output part. The upper edge of the reflection part is below the output part, and the lower edge is above. This allows the output part to receive the most reflected light. The smaller reflection part size reduces module size. The light source collects light and then reflects it into the output part. This converges the beam angle for higher utilization. The module can be used in headlights with vertical, horizontal, or oblique mounting for single or multi-function lighting.

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Tunnel lighting energy-saving control strategy that reduces tunnel lighting regulation frequency, energy consumption, and carbon emissions. The strategy involves optimizing tunnel lighting and vehicle lighting power levels together to minimize total power. It considers the impact of tunnel lighting intensity on vehicle lighting activation. By finding the optimal balance between tunnel and vehicle lighting power when entering the tunnel, it reduces excessive tunnel lighting adjustments and interference. This reduces total power consumption compared to independent regulation.

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Energy-saving management and control of tunnel lighting systems using vehicle perception data. The method involves determining the exact lighting requirements for each vehicle in the tunnel at any given moment based on its position, speed, and heading. This allows targeting specific areas with lighting instead of blanket coverage. The system then controls the tunnel lights based on these requirements, turning some off, maintaining others, and transitioning others gradually to save power. By optimizing lighting based on vehicle needs, it reduces energy consumption without compromising safety.

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Headlight for vehicles with improved homogeneity of light functions and reduced complexity compared to conventional headlights. The headlight has a single pivoting light module that contains a matrix of individually controllable LEDs for high beams and a separate LED for low beams. The high beam matrix segments can be selectively activated and masked based on steering angle to adapt the beam pattern. This allows precise segmented high beam illumination without shading outer regions like conventional adaptive systems. The pivoting mechanism allows the module to rotate around a vertical axis through the center of gravity for rigidity. The pivot angle can also affect which segments are activated. A control unit coordinates the LEDs and pivot drive.

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A headlight design for vehicles that uses light guides instead of reflectors to reduce cost and size compared to prior art headlights. The headlight has separate light guides for the low and high beams instead of using a reflector for the low beam. This allows a more compact and less expensive headlight design. The light guides have entry surfaces for the low beam LEDs and exit surfaces to direct the light. The low beam guide prevents stray light from entering the high beam guide. The low beam guide can also have structured exit surfaces to homogenize the light and prevent hotspots on lenses.

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Energy-saving operation of lighting systems with dimmable LED modules and converters. The method involves finding the optimal dimming level and lamp current for the LED module that maximizes the overall system efficiency. This involves evaluating efficiency curves for the LED module and converter at different temperatures and currents. By determining the efficiency tradeoffs between the module and converter at various dimming levels, an optimal dimming level can be found where the combined efficiency is higher than at full brightness. This allows dimming without significant efficiency loss. The method involves using efficiency data sets for the module and converter at different temps and currents to find the optimal dimming level.

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Reducing inhomogeneities in the edge regions of the light image of pixel-light headlights by adjusting the spacing between light sources in the high-beam row versus the row above it. In the edge regions, the vertical distance between the high-beam row and the row above decreases more than in the center. This shifts the outer high-beam sources slightly upwards, reducing dark stripes in the edges. The center high-beam sources maintain the same spacing for a taller main-beam.

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Vehicle headlight with reduced cost and improved transition between lighted and unlighted areas. The headlight uses multiple monolithically pressed primary optic arrays made of transparent inorganic glass. The first array has an entry face and the second array has an exit face. Additional arrays can be added. The close spacing between arrays creates a smooth gradient between lit and unlit areas without visible transitions. This allows softer cutoffs and better light distribution compared to separate optics. The monolithic molding reduces costs compared to multiple separate optics.

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A lighting module for vehicle headlights that enables customizable adaptive driving beams without complex optical systems. The module has a primary optical element with a light pixel forming structure that cooperates with a light source. The primary element has a corrector diopter at the exit. Multiple identical modules arranged horizontally create continuous light segments. The diopters form a toroidal surface. This allows simple, standardized modules instead of bespoke lenses for each headlight design. The segments can be duplicated and juxtaposed to form a continuous illuminated field.

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A primary optical element for a headlight module that enables multiple lighting functions like an adaptive beam, dynamic bending light, and weather light from a single module. The element has a vertical stack of primary optical guides facing separate light sources for a segmented beam. Above that, continuous primary guides face another set of light sources for a homogeneous beam. This allows the creation of segmented high beams and homogeneous low beams using different sources and guides. The segmented guides can be switched off for adaptive beams. The homogeneous guides can have varying intensities for weather light. The module can also have a secondary element to shape the light further.

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Efficiently operating LED-based light sources by monitoring LED conditions and supplying exactly the required power instead of excess power. A controller monitors metrics like LED efficiency and lifespan, and adjusts the power supply accordingly to maintain light output. This avoids wasting energy supplying constant excess power for lumen maintenance. The technique allows optimized power usage by dynamically matching power to LED conditions instead of overcompensating for lumen depreciation.

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