LED Light Distribution Control

A centralized method for optimizing street lighting control to improve visibility and energy efficiency. The method involves predicting light levels at specific points using historical and real-time weather, traffic, and pedestrian data. It calculates optimal lamp dimming scenarios over a prediction horizon. A model predictive control algorithm adjusts lamp brightness based on the predicted light needs and weighted significance of each point. This dynamically adapts lighting for conditions like rain, fog, and traffic.

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Adaptive energy-saving adjustment method and system for lighting systems using high-efficiency LED lamps. The method involves dividing the lighting system into areas, using motion sensing to detect activity, dynamically adjusting light levels based on scene recognition and ambient brightness, predicting energy consumption, comparing to actual consumption, and correcting if needed. This allows intelligent, context-aware optimization of LED lighting to save energy without sacrificing functionality.

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Hybrid light source control for accurate color temperature and brightness adjustment in mixed LED lighting. It uses real-time environmental data, duty cycle modeling, and spectral analysis to adaptively control mixed LED lights. The method involves: filtering luminous flux based on target color temp, compensating for light source attenuation, calculating duty cycle from target flux, and controlling mixed lights with duty cycle and power. This closed-loop feedback adjusts luminous flux, duty cycle, and power in response to environment and light source changes. It improves mixed light source accuracy compared to fixed algorithms.

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Intelligent lighting control system for LED lamps that optimizes lighting based on environmental conditions. The system divides the LED lamp pre-lighting area into regions, analyzes lamp health, monitors environmental conditions, determines optimal lamp usage based on light level, and optimizes lamp ratios. This allows adaptive lighting that adjusts lamp count and brightness based on factors like activity, environment, and aging.

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Intelligent LED lamp control system that adjusts brightness and angle of LED lamps based on current, light, and occupancy sensing. The system has modules for detecting input current, light level, and occupancy at each lamp position. A distribution module allocates current based on input, position, and occupancy. Adjustment modules then change brightness and angle of the allocated lamps. This provides intelligent, dynamic lamp control versus fixed presets.

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Uniformly controlling the illuminance of LED lighting systems with multiple LED arrays containing LEDs with different forward voltages. The method involves individually controlling the current applied to each LED in an array based on its illuminance, then balancing the total array illuminance by adjusting the current limits. An illuminance detection unit finds the lowest illuminance LED in each array. It then sets the array current limits to make all LEDs have the same illuminance as the lowest one. This compensates for variations in forward voltage. By independently controlling the current for each LED and array, it balances illuminance across arrays with mixed LED types.

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Intelligent indoor lighting system that dynamically adjusts lighting parameters based on ambient light, scene requirements, and fault detection. The system has multiple light source modules, a reflector module, a light distribution module, and a processing module. The source modules send data on light level and status. The processing module analyzes this to determine optimal brightness and range based on ambient light. It also detects source faults and issues alarms. The reflector and distribution modules then adjust light output accordingly. This allows automated, dynamic lighting optimization and fault tolerance.

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Tunable white light LED device that provides high-quality light with adjustable color temperature and enhanced color rendering for applications like circadian lighting. It uses a combination of three LED strings (blue LEDs with phosphor coatings), each with a different color phosphor, to generate unsaturated light of different colors. These unsaturated light spectra are mixed to create a tunable white light that can be adjusted along the black body locus of correlated color temperatures. The device uses a drive circuit to adjust the relative currents to the LED strings and achieve the desired color point.

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An LED lighting system that provides efficient, glare-free illumination with adjustable color and directionality to replace fluorescent tubes. The system uses multiple LEDs mounted on a transparent support structure. Reflectors redirect light emitted in undesirable directions toward the desired illumination direction. Phosphors on the support structure homogenize the LED colors for a consistent appearance.

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UV LED sweeping device that enhances UV radiation dosage and coverage area for applications like sterilization, disinfection, curing, and phototherapy. It uses a rotating polygonal mirror to sweep UV light emitted by a bundled UV LED array. The mirror changes the direction of the beam, expanding it into a larger sectorial region. This allows efficient and uniform irradiation over a wider area compared to fixed UV LEDs.

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An adjustable lighting fixture that maintains high light output even when angled. The fixture has an adjustment module that slides horizontally as it tilts to keep the center of the light beam pointed at the ceiling opening. This allows the module to be tilted without blocking part of the light cone. The module pivots on spring-loaded brackets that hold it in position. The brackets also act as sway bars to guide the module's motion and counterbalance its weight.

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Surface illumination device that reduces flicker, eye strain, and fatigue. The device emits light that is directed away from the user's line of sight. This is achieved by configuring the light distribution so that the maximum intensity angle of light emitted from the center of the device's light-emitting surface is within -90° to <0° in a plane perpendicular to the surface. This avoids direct perception of the light and reduces flicker perception.

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Improving the uniformity of light dispersion from horticulture grow light fixtures to deliver more uniform light across a target area and reduce hotspots. This is achieved by rearranging the positioning of the individual LEDs or light emitters so that a greater density of light emitters is used near the edges of the fixture versus the center. By projecting higher levels of light near the edges it brings more light to the periphery and reduces the difference between edge and center light levels.

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LED filament bulb with omnidirectional light emission and high efficiency. The bulb uses a flexible LED filament shaped to emit uniform light in all directions. The filament has multiple flat segments connected by bendable sections. This allows the filament to be shaped in a non-linear configuration compared to traditional straight filaments. The shaped filament emits light uniformly in 360 degrees. The bendable segments prevent disconnection when the filament is flexed.

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Light emitting diode (LED) array with a window that shapes and focuses the light in a way that minimizes variations in intensity across the beam angle. The LED array has a matrix of closely spaced LED chips on a substrate. A dome-shaped window covers the LEDs and controls their emitted light paths. The window has a convex lens shape with a height of 70% or less than its lower diameter. This concentrates the light within a 90-degree beam angle while reducing peaks and valleys in the light profile

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White LED lighting that closely mimics natural sunlight and has improved color rendering compared to traditional LEDs. The device uses broad-spectrum blue LEDs as the excitation source along with optimized green-yellow and red phosphors. The broad blue excitation fills in the cyan trough between blue and green phosphors, boosting color rendering. The result is full-spectrum white light that appears more natural, has higher CRI, and reduces eye damage from excessive blue light exposure.

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LED lamp design to improve color rendering by using a combination of white LEDs and purple LEDs. The purple LEDs emit in the UVA spectrum. The white LEDs provide the main light output while the purple LEDs fill in the UVA range. The combined light enhances color rendering compared to just white LEDs. Alternating white and purple LEDs allows overlap of the UVA range. The purple LEDs can be 400-420nm wavelength.

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LED lighting device design that improves light output and color consistency over different angles. The design uses a lens assembly mounted over the LED, with a gap between the lens and elastomer encapsulant. This allows light to reflect off the lens surfaces instead of being absorbed by the elastomer. A reflector in the gap can further control light direction. The lens can also have features like a recess or scattering element to mix light. This reduces color variations and improves uniformity compared to traditional LED encapsulation.

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Lighting apparatus with improved luminance using LEDs and reflectors, without increasing thickness or light sources. A reflective unit with a spaced area under each LED increases reflectivity and luminance. The spaced area can be defined by an optical pattern layer to replace a light guide plate.

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Backlight module for displays that uses magnet attraction between adjacent lamp plates to reduce visible gaps. The backlight module includes a back plate, lamp plates, diffuser plate, optical films, and magnetic attraction parts. The lamp plates are magnetically attracted to the back plate to reduce gaps between them when stacked. This improves display quality by minimizing visible seams between lamp plates.

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