Safety Controls for LED Lighting Systems

Dual-system modular LED signal for railway applications that improves reliability, safety, and maintainability compared to traditional LED signals. The signal uses separate control and display units to isolate faults, enable ground-level maintenance, and prevent worker exposure. The control unit has a self-diagnostic feature that detects LED failures and switches to a backup system when 30% of LEDs are off. It also compensates LED brightness for distance and temperature. This eliminates the need for separate relay devices inside interlocking devices. The display unit contains only LEDs and resistors. The control unit calculates LED failure rates and provides constant light intensity. This reduces failures, improves display life, and simplifies the display unit.

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An LED lamp design that enables high-power LEDs to operate without external heat sinks. The design features a cylindrical transparent housing containing a flexible PCB with mounted LEDs rolled up inside. The PCB is coated with a thin transparent layer to protect the LEDs. The rolled PCB, LEDs, and driver components are all enclosed within the housing, allowing efficient heat dissipation directly into the surrounding air through the transparent housing.

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A rearview mirror assembly featuring an integrated blind spot warning indicator. The assembly includes an optical housing and a lighting module that emits light through an inclined bottom surface. The housing's inner surfaces increase and then decrease in height towards the light source, shaping the emitted light beam. This design ensures high luminance light for the driver and lower luminance light for vehicles behind, enhancing visibility and safety.

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White LED lighting is designed to closely mimic natural sunlight, offering improved color rendering compared to traditional LEDs. The device uses broad-spectrum blue LEDs as the excitation source, combined with optimized green-yellow and red phosphors. The broad blue excitation fills in the cyan gap between the blue and green phosphors, enhancing color rendering. This results in full-spectrum white light that appears more natural, has a higher Color Rendering Index (CRI) and reduces eye damage from excessive blue light exposure.

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An LED tube lamp with an installation detection circuit that ensures proper connection to a lamp socket. The detection circuit outputs two pulses and includes a switch that receives these pulses along with the LED driving signal. If the lamp is not detected as properly connected during either pulse, the switch remains off, preventing the lamp from lighting up. If the lamp is detected as properly connected during at least one pulse, the switch stays on, allowing the lamp to light up. This mechanism ensures that the lamp only operates when fully installed, enhancing safety and reliability.

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Preventing eye injury from laser light sources by using polarization optics to block the laser light if the phosphor is damaged or removed. The system uses a polarized laser source and optics that change polarization. When the phosphor is intact, it absorbs the polarized laser light and emits scattered light. But if the phosphor is damaged or gone, the polarized laser light can pass through the optics unchanged. This allows the system to generate white light when working properly but blocks hazardous laser light if the phosphor fails.

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Ensuring stable operation of tunnel lighting equipment when it fails, to mitigate safety risks and prevent complete outages. The system uses sensors, IoT devices, and a central control computer to monitor and manage the lighting system. It continuously checks equipment like LED lamps, drivers, sensors, and controllers. If a failure is detected, the system diagnoses the issue and takes actions like manual brightness adjustment, sequential control, and timing to maintain some light. It also alerts maintenance personnel to fix the failure. This enables partial functionality and reduced risk during equipment breakdowns.

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LED health monitoring system for optimizing reliability and longevity of LED lighting installations. The system has modules for LED driving, weather sensing, status monitoring, and human-computer interaction. The central control module connects to the LED driver, weather sensor, and user interface. The status monitoring module between the LED module and control monitors LED electrical characteristics. This allows real-time health monitoring based on LED electrical performance, weather data, and user input.

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Real-time monitoring of LED lighting system to detect and diagnose faults early. The system has a central control module connected to a monitoring module and multiple LED lights. The monitoring module measures power consumption of each light and sends data to the control module. The control module analyzes the data to determine light status. This allows identifying and addressing issues before they cause failures.

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A lighting monitoring system for detecting and alerting issues with lighting devices in use environments. The system involves installing a single-chip computer in each lighting device that monitors parameters like voltage, current, and temperature. The computers periodically send the lighting status to a central host computer. The host checks if thresholds are exceeded and issues alarms if so. It can also call neighboring devices to verify. The system allows remote monitoring of lighting health and rapid response to failures.

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Lamp maintenance device and method that uses real-time monitoring and cloud-based analysis to predict and prevent lamp failures. The device has components like lightning protection, temperature sensors, and an LED light source. It detects lamp health parameters like temperature, humidity, inclination, and lightning strikes. A local collector sends this data to a cloud server for analysis using machine learning algorithms to detect anomalies, diagnose faults, and predict failures. The cloud server can then instruct the device to take actions like replacing lamps or components before failures occur.

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Monitoring LED luminaires to detect failures before catastrophic failure occurs. The luminaire has a driver connected to a sensor that measures parameters like temperature, voltage, and power. A controller analyzes the sensor data to detect partial LED failures, driver degradation, or other issues that take the LED voltage outside its normal range. If failures are imminent, the controller can provide warnings like illumination changes or audible alerts.

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Outdoor LED light bar assembly that has features to prevent damage from water ingress, detect temperature and humidity inside the bar, and provide remote monitoring for maintenance. The assembly has a temperature and humidity sensor in the inner shell, a desiccant to absorb moisture in the gap between the outer and inner shells, and a wireless transceiver to send alerts if conditions exceed thresholds. When no one is detected nearby, the light can be turned off to save power. This prevents water entry, prevents internal moisture buildup, and enables remote monitoring to quickly identify and locate issues in the light bar.

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Smart LED lamp with emergency backup and sensor features to provide stability and convenience in lighting. It includes sensors for temperature, light intensity, and voltage anomalies, along with a battery, controller, relay driver, MCU, and power supply. This allows the lamp to adapt lighting based on conditions, prepare for voltage issues, and provide backup illumination during power outages.

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A lighting device that deactivates pathogens like bacteria while providing visually appealing light. The lighting device uses LEDs emitting blue light around 470 nm which is known to be effective at deactivating pathogens. The blue light then passes through a phosphor coating that converts some of it to longer wavelength visible light with a minimum irradiance of 0.01 mW/cm2. The converted longer wavelength light mixes with the blue light to form a combined light that is directed into the air. This allows the device to provide pathogen deactivation while still being a normal visible light source. The longer wavelength light prevents any potential negative effects of pure blue light while still providing sufficient blue light for pathogen deactivation.

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A light-emitting device with good color rendering and germ-reducing properties. It contains a light-emitting element emitting in the blue light range, and a phosphor that emits yellow, green, and red light when excited by the blue light. The phosphor composition includes europium-activated alkaline-earth phosphate, europium-activated halogen-containing alkaline-earth silicate, cerium-activated rare-earth aluminate, and europium-activated silicon nitride containing aluminum and at least one of strontium and calcium.

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LED lamp lighting module with built-in environmental monitoring and airflow to prevent overheating. The module has a body with connecting pipes on both sides. Fans are placed inside the pipes to circulate air. This allows monitoring of the lamp's environment and provides active cooling to prevent overheating. It addresses the issue of LED lamp safety and longevity by allowing real-time monitoring of the lamp's use environment and actively cooling the lamp to prevent overheating.

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Integrated LED lamp driver with NFC and power metering for smart lighting control and monitoring. The lamp driver has modules for NFC communication, temperature sensing, wireless communication, microcontroller, drive circuit, and power supply all integrated in the lamp housing. It can report lamp status to a network, control via network, monitor lamp power usage, adjust lamp brightness, and alert for overheating. The integrated functionality enables smart lamp features like remote control, power tracking, temperature monitoring, and safety alerts.

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LED lighting control system that improves reliability and efficiency by using on-board sensors to monitor temperature and light levels of the LED source itself, as well as external environmental sensors. The system adjusts LED brightness based on these internal and external conditions to optimize performance and prevent overheating. It also enables more accurate fault detection by checking LED light levels in the off state. This allows determining if the LED is truly defective versus just turned off.

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High-power LED street light control system that optimizes energy efficiency and heat dissipation through intelligent dimming, active cooling, and personalized brightness control. The system uses a microcontroller, real-time operating system, LED driver, thermoelectric cooler driver, and sensors to monitor environmental factors like brightness, temperature, and motion. It intelligently dims the LEDs, activates cooling, and adjusts brightness based on conditions like low light, activity, and heat. This allows efficient, adaptive lighting without waste.

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