Human-Safe LED Lighting: Innovations and Technologies

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.

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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.

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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.

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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.

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

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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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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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A lighting module and device with improved heat dissipation and eye protection for LED lighting. The lighting module includes a bottom plate for heat dissipation, a light emitter with lenses, and a protective upper case. A gasket seals between the outer frame of the lenses and the upper case to keep out contaminants and shield the light. This provides good heat sinking from the bottom plate, while protecting the light output from the lenses by sealing the protection case.

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A lighting device for efficiently emitting light from an LED light source while protecting the eyes of users. The device uses a specific configuration of heat sink, light source, reflector, and reflective sheet to optimize light output and distribution.

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