LED Pattern Enhancement for Light Distribution

Light source device for exposure equipment like lithography machines used in semiconductor and display manufacturing. The device has an LED array with multiple chips and a control unit that adjusts the output of some chips to change the combined light intensity distribution. This allows optimizing the light distribution in the pupil plane for better imaging performance compared to uniform LED arrays. The control unit can compensate for non-uniformities in the LED array's intensity distribution to create a more uniform and symmetric pupil light intensity.

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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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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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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 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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Lighting device with high color rendering using a combination of blue and purple LEDs. The device has a substrate, blue and purple LEDs on the substrate, and a phosphor-coated transparent housing enclosing the LEDs. The blue and purple LEDs stimulate the phosphor to emit white light with enhanced color rendering. The mixing of blue and purple light allows the white light to partially overlap the UVA spectrum, improving color rendering compared to blue-only LEDs.

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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 plates, 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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Homogenizing the output of LED luminaires with multi-emitter arrays to eliminate color banding and streaking. The technique involves using a partial diffuser in the LED array itself. The diffuser scatters light from some LEDs while leaving light from others undiffused. This mixes the colors internally to create a more homogeneous output. The undiffused light from the second subset of LEDs is then combined with the diffused light from the first subset to produce the overall luminaire output. An optical device can further modify the beam.

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Lighting system that adaptively adjusts lighting parameters to provide optimal lighting conditions without visual fatigue or damage to the lighting modules. The system has multiple LED modules, an optical parameter collector, and a processing module. The modules feed back their operating status, the collector gets surface optical parameters, and the processor adjusts module output based on feedback and parameters to optimize lighting. This adaptive adjustment considers factors like module health, surface conditions, and installation height to avoid issues like visual fatigue and damage from changes in lighting distance.

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Adjustable light distribution for LED lighting fixtures using optical patterns on the fixture cover. The cover has an optical pattern that transmits and reflects light from the LEDs to change the distribution. The pattern can condense, diffuse, or deflect the light based on dot or line shapes. It divides the LED area into center and side portions with widening, narrowing, or protruding patterns. This allows customizing the brightness and spread of the emitted light.

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Angularly varying light emitting device (AVLED) with independently adjustable light flux and spectral output in multiple angular bins. It optimizes illumination/irradiation by directing light where needed instead of wasting it in unused zones. The AVLED has sensors, cameras, or scanners to detect the environment, then adjusts light output in specific angular bins. This can follow individuals, provide predictive lighting, avoid glare, or adapt for variable needs. The AVLED may also have movable axially redirecting optical elements to change the light output directions.

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A lighting device for tunnels that provides adjustable light distribution without using expensive lens elements. The device has an LED substrate with multiple LEDs covered by a diffusion cover with multiple emission surfaces. Some LEDs are reflected towards specific emission surfaces using internal reflectors. This concentrates light from some LEDs onto certain surfaces while others emit directly. This creates a mix of light beams with different intensities from different surfaces, allowing customized light distribution without lenses.

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An adaptive precise LED lighting system that dynamically adjusts mixed light color and quality in response to changes in the LED sources over time. The system uses sensors to monitor the actual optical parameters of the LEDs, like color temperature and CRI, and feeds that back into the control system. This allows it to compensate for drift and aging of the LEDs and maintain accurate color mixing. The method involves collecting the initial optical parameters of each LED, then adjusting the drive currents and duty cycles to match a target color. The system continuously monitors the LED parameters and makes real-time adjustments to maintain the desired color.

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A lighting module for improving color rendering and consistency in luminaires like office lights. The module has a light source, optical mixing element, color shift elements, and spectral converting diffuser. It provides edge lighting to a luminaire. The color shift elements emit different colors. The diffuser converts the light spectrum. This allows customizing the overall light output to match and balance the colors from multiple luminaires over time as their LEDs age differently.

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A lighting system with multiple light modules and controllers that adjust the brightness of each module's LEDs to balance illuminance when multiple modules overlap on a surface. This prevents hotspots and dark areas when multiple modules are close together. The controllers adjust the brightness of each LED in the modules so that the combined light output per unit area of overlapping areas is within a certain range of the non-overlapping areas. This ensures consistent illumination across surfaces when multiple modules are close together.

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Variable light distribution luminaire for stationary installation that allows customizable lighting for different applications without needing multiple luminaire models. The luminaire has a configurable optics system that can change the light distribution pattern by adjusting the position, orientation, and coverage of the optics relative to the light source. This allows fine-tuning of the light output to match specific spatial requirements. The optics can have features like moveable sections, changeable transparency, GRIN lenses, and multiple zones with different refractive indices. The luminaire also has a control system to manage the optics configurations. By varying the optics instead of using multiple luminaires, the luminaire can adapt to different lighting needs while still being a single universal product.

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An electronic lighting device that simulates a flickering flame using a flame sheet that sways like a real flame. The device has an enclosure with a hole in the top, a suspended flame-shaped sheet that extends out through the hole, a light inside the enclosure that shines up through the hole onto the sheet, and a mechanism below the sheet that makes it sway. The projected light on the moving sheet creates a realistic flame effect similar to a candle. The device provides an improved visual experience compared to static LED flame simulations.

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