Minimizing Glare in LED Lighting Systems

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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An LED downlight fixture with anti-glare features. The fixture includes a housing with an anti-glare cup that blocks direct light from the LED source and reflects it downward. This prevents the LED light from shining directly into people's eyes.

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LED downlight apparatus with an anti-glare feature that mitigates direct light emission. The apparatus comprises a rim housing, an anti-glare cup surrounding the LED light source, and a driver module. The cup helps direct light downwards while shielding the LED from direct view. The driver module powers the LED.

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A low-glare, ruggedized, shock-absorbing, diffuse, reflecting luminaire that provides enhanced lighting efficiency, effectively filters or eliminates ultra-violet light, reduces energy costs (and carbon footprint), and reduces harmful glare without being overly large for both fixed and transportable uses. The luminaire uses an internally mirrored-shaped lens to spread light evenly and project it horizontally rather than focusing. The lens material contains UV filtering additives. The semi-soft flexible lens protects components. A Fresnel-like lens can be added. Shock-absorbing mounts reduce bulb damage.

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A light-emitting device that replicates the appearance of an incandescent bulb while avoiding glare when the LED filament intensity is increased. The device has a centrally arranged translucent core containing the LED light sources, surrounded by an outer bulb containing the LED filament. The core is designed to scatter and reflect light more at the filament position to increase the intensity ratio compared to the core. This allows higher filament intensity without glare.

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An LED retrofit lamp that mimics the appearance of incandescent bulbs while avoiding glare at higher brightness levels. The lamp has a translucent central core with LED light sources inside, surrounded by LED filaments outside the core. The core is designed to scatter and reflect light more around the filaments than in the rest of the core. This creates a higher-intensity contrast between the filament light and core light. It also reduces glare when the filament brightness is increased.

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Light fixtures that provide customizable, field-reconfigurable, and glare-free lighting for indoor spaces. The fixtures have modular components that can be easily changed to customize the fixture's lighting output. Key components include removable light engines, interchangeable adapter plates, and a baffle that hides the light sources at high angles. The fixtures can be reconfigured by disassembling from below to add, remove, and/or replace components. The modularity allows easy customization and upgrades without replacing the entire fixture. The fixtures also provide glare-free lighting with a baffle that hides the light sources at high angles while providing smooth reflections.

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A lighting device for a luminaire that produces less glare when the lumen output is increased. The device has a base, LED filaments, light guides, and a transmissive envelope. The LED filaments emit light in a first spatial distribution. The light guides the couple into the light and emits a second distribution. The light guides are external to the filaments. This reduces glare as increasing filament brightness is offset by diffusing light from the guides. The device mimics incandescent bulbs with decorative LED filaments but avoids glare at high output.

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A rugged, glare-free, energy-efficient luminaire that provides uniform, low-glare illumination for outdoor area lighting. The luminaire uses an internally mirrored, cylindrical lens with UV-filtering and shock-absorbing properties. The lens shape and internal mirrors spread the light horizontally for wide area coverage. The flexible lens protects components and allows transport without disassembly. The lens also has Fresnel-like optical structures for uniform horizontal dispersion.

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Lighting apparatus for providing comfortable lighting for the aging population. The lighting apparatus has two light source modules. The first module has a narrow beam angle and higher color temperature to provide focused task lighting. The second module has a wider beam angle and lower color temperature to provide ambient lighting. This configuration improves visibility for aging people by reducing glare and increasing color saturation. The narrow beam task lighting helps with visual tasks and wider beam ambient lighting provides overall illumination.

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Light emitting device that looks like an incandescent bulb but avoids glare when the LED filament intensity is increased. It has an LED filament outside a central translucent core with LED light sources. The core surrounds the filament. This configuration prevents excessive glare as the filament brightness increases. The core can have reflective or backscattering properties at the filament position to increase its intensity compared to the core.

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LED lighting fixture for reducing glare in low bay applications like parking garages. The fixture uses a modular design with a primary optic to distribute light and secondary optic to focus light. A tertiary lens is added to diffuse the concentrated light and reduce glare. The tertiary lens also acts as a cover that channels airflow over the LEDs to cool them.

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An LED light design that reduces cost and improves performance by using a specially designed heat sink shell and a reflecting cup around the LED. The heat sink shell has fins and ventilation openings to maximize natural convection for cooling. The reflecting cup captures and redirects light from the LED to reduce glare.

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Light diffuser with controlled wavelength selectivity and brightness for LED lights. The diffuser contains a thermoplastic resin and transparent particles added thereto. The key parameters are a total light transmittance of 50-85% and a wavelength selectivity in the rectilinear light ratio of 1.5-5.0. The selectivity is based on the particle size, refractive index difference from the resin, and dispersion of the particles. The diffuser reduces glare from LED lights while maintaining brightness.

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Light mask optical device with grating structures to reduce glare while maintaining brightness. The device is made of transparent plastic with grating structures on the light outlet face. The structures have slanted sides and a flat top to form inverted trapezoids. This causes light to circulate within the grating before exiting. The circulating light combines with direct downward light to be concentrated at the center of the outlet face, reducing glare. The grating structures enhance incident light, reducing the need for coatings that block light and decrease brightness.

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Reducing glare from LED luminaires used in low bay applications such as parking garages. The aim is to diffuse the intense point sources of LED light to make the luminaire appear larger and more homogenous, thus reducing brightness. This is done using a tertiary optic that covers the primary optics and diffuses the light. The tertiary optic lens is designed to diffuse light coming from a high angle of incidence relative to the LED substrate.

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