LED Safety Standards for Human Exposure

A heat control device for high-output LED lighting that minimizes heat generation in the LED emitting part while maintaining overall illumination. The device uses temperature sensors on each LED string to detect overheating. When an LED string gets too hot, it selects an adjacent string to compensate by increasing its brightness. This redistributes the total lumens to balance the temperature instead of reducing all strings. By selectively dimming hot LEDs and compensating with nearby brighter ones, it prevents localized overheating without sacrificing overall brightness.

Source

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 and optimized green-yellow and red phosphors. The broad blue excitation fills in the cyan trough between blue and green phosphors, boosting color rendering. Full-spectrum white light appears more natural, has higher CRI, and reduces eye damage from excessive blue light exposure.

Source

Improving the safety of LED lighting by actively adjusting drive current to LEDs based on temperature measurements. A current controller communicates with temperature sensors on the LED load. When the load temperature reaches a threshold, the controller reduces the current provided to the LEDs to prevent overheating. This allows the LEDs to cool before resuming normal operation. The controller can also balance current between multiple LED loads to prevent imbalances that could lead to failures.

Source

A method to provide lighting fixtures that can both illuminate an environment and disinfect it by deactivating pathogens using ultraviolet light. The fixtures are arranged and powered to deliver the necessary dose of germicidal UV light to all exposed surfaces in the space, but without exceeding safe levels. This involves determining the fixture arrangement and power level based on the space size, desired illuminance, and estimated occupancy over time. The fixtures are then installed and operated to deliver the determined power density of UV light.

Source

Intelligent lamp that can adaptively adjust temperature rise to prevent overheating and prolong lamp life. The lamp has an LED board, control chip, communication module, power source, and temperature sensor. The communication module wirelessly connects to an external device. The chip controls LED brightness based on sensor temperature data collected by the module. This allows the lamp to dynamically adjust brightness to prevent excessive heat generation. The chip reduces LED power when the lamp gets too hot, avoiding overheating issues.

Source

A highly efficient, safe, and controllable solid-state light source that uses a volumetric phosphor conversion technique. The light source has an LED or laser diode emitting a primary spectrum. The emitted light is directed onto a composite converter containing phosphor particles. The converter absorbs the primary light and re-emits converted light of a different spectrum. A reflector focuses the converted light towards an output filter that conditions the final emitted light. The volumetric phosphor conversion allows more efficient conversion of the primary light compared to thin phosphor coatings.

Source

Light-emitting device with improved color rendering properties and germ-reducing capability. The device achieves good color rendering across the visible spectrum using phosphors with specific emission wavelengths. It contains a blue LED combined with four phosphors: a blue/green emitting phosphor, a green-emitting phosphor, a red/orange emitting phosphor, and a red/orange emitting phosphor. The combination of these phosphors allows white light to be generated with high color rendering properties across a range of Ra 90-100. The device emits light that makes objects and colors appear more natural compared to standard white LED lighting. The device also uses a UV-blocking resin to reduce the proliferation of germs.

Source

An eye-safe light source that maintains light emission efficiency while improving light distribution characteristics.

Source

LED lamp with active temperature control to improve reliability and thermal management. The lamp has a light module with an LED source on a heat sink attached to a larger forced-cooling heat sink with a Peltier element. Temperature, ambient light, and interior light sensors are added. A dimmable driver, microcontroller, and power switch are included. The microcontroller controls the Peltier element and dimmable driver based on sensor readings to maintain optimal LED temperature.

Source

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.

Source

A lighting device that kills harmful germs in an environment like a hospital room or food processing facility using a combination of LED lights that are both effective against pathogens and visually appealing. The device has LEDs emitting different narrow ranges of visible light that mix to create a non-white light. This allows the device to provide pleasant lighting while also continuously disinfecting the air and surfaces in a room. The lighting device is designed to stay cool and be mounted anywhere like a regular light fixture.

Source

A grounded connector system for LED tube lamps that provides a safe, reliable and convenient solution for grounding the LED heat sink and internal components. The system includes a three-part connector that securely attaches the ends of the LED tube to the fixture while also grounding the exposed heat sink. The connector parts have pins and sockets to mechanically connect and electrically ground the tube ends. A connector sleeve can be used to hold the two connector parts together during installation. The grounded connector system protects against electrical shock and fire hazards from exposed components, provides surge protection, and ensures proper grounding of the heat sink.

Source

A lighting system that deactivates pathogens like viruses and bacteria using a targeted narrow spectrum of visible light while providing visually appealing white light. The system has LED lights that emit a specific wavelength range known to kill pathogens. These lights are combined with other LEDs to create white light that meets color quality standards for indoor lighting. The white light masks the pathogen-killing light so the device can be used continuously in occupied spaces.

Source

Lighting device that deactivates pathogens like bacteria and viruses in the air of a room while providing visually appealing light. The device uses LEDs emitting narrow spectrum visible light at 470nm that can deactivate pathogens. Phosphor coatings convert some of the light to longer wavelengths above 500nm. The device irradiates the air with a minimum of 0.01 mW/cm2 of the 470nm light mixed with longer wavelength light to sanitize.

Source

Temperature control circuit for LED lamps that cooperates with a magnetic ballast to dynamically adjust LED output power and internal temperature when the lamp gets too hot. The circuit has a temperature sensor with a negative temperature coefficient thermistor and a phase cut circuit. When the temperature sensor detects an excessive internal temperature, the phase cut circuit reduces the thermistor resistance to decrease LED drive current and power. This protects the LEDs and extends lamp life by reducing excessive heat generation.

Source

A lighting device that deactivates dangerous pathogens while providing visually appealing light. The device uses LEDs in specific wavelength ranges that mix together to form visible light other than white light. This allows the light to both kill pathogens and illuminate spaces without objectionable effects like disorientation or headaches. The device can be used in environments like hospitals to reduce pathogens without toxic chemicals or special UV lighting.

Source

An eye-safe light source that improves the light emission efficiency while regulating light distribution characteristics. The light source includes a semiconductor laser joined to a substrate with the wire perpendicular to the laser emission direction. The substrate has a curved reflection surface that faces the laser emission end to reflect the laser light. This avoids shadows and scattering bodies between the laser and reflector.

Source

LED lighting system with automatic control to improve flexibility, health and convenience compared to conventional LED systems. The system uses a control unit connected to an LED power source, with components like a signal acquisition module, LED execution component, LED temperature display, driving module, fault prompt and alarm module. The driving module connects to separate monochrome and two-color conversion modules. The LED color can be dynamically adjusted based on indoor temperature, occupant needs, and color dissipation to overcome the limitations of fixed color LEDs. This provides better customization, comfort, and heat management compared to fixed color LEDs.

Source

LED lighting system comprising a fixture with a replaceable LED module. The module can be easily inserted into and removed from the fixture. Magnets secure the module in place. The fixture contains the AC to DC power conversion circuitry. This allows for efficient operation and a touch-safe interface. The modular design enables easy replacement of the LED module if it fails or becomes outdated without having to replace the entire fixture.

Source

A light puck designed for attaching to a wire rope tension grid in theaters and performance venues to provide stage lighting. The puck has a top cover with slots to receive wire ropes from the grid, a bottom cover with an opening, a light fixture with LEDs that extends through the opening, and a biasing plate with an adjustment screw that biases the fixture against the top cover. This allows the puck to securely attach to the wire ropes without obstructing the grid or causing tripping hazards.

Source