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 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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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 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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Smart lighting system with multi-source coordination and automatic parameter optimization. The system has multiple LED lights emitting beams of different frequencies. A receiver captures some of the beams. A calculation module extracts optical parameters like intensity, color temp, CRI from the received beams. A control module adjusts the LED parameters based on the calculated values. This allows simultaneous measurement and optimization of multiple lights in a space. It eliminates the need to remember individual LED codes and provides consistent lighting environments.

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Low profile LED lighting module with reduced cross-section and improved light uniformity. The module uses primary optics to customize light output from multiple LEDs and a reflective back surface to redirect and blend the light. A secondary diffuser scatters the light for uniform emission. The module has a minimized height-to-width ratio and reduced LED density to balance efficiency and uniformity.

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LED lighting device with automatic light uniformity adjustment based on environment. The lighting device has an LED light source, a light guide, and three parts - a light guide part, a data part, and a control part. The control part adjusts the light emission uniformity in response to environmental factors detected by the data part. This allows the lighting device to adapt the light distribution to optimize performance in varying environments.

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LED lighting control system with adjustable illumination uniformity and localized intensity control for scenes. The system uses scattering lenses on the LEDs and a telescoping mechanism to adjust position and power of lamp groups. This improves uniformity by dispersing light from the LEDs and allows targeted intensity adjustment in specific areas.

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Spatial dimming of LED arrays to improve dimming resolution beyond the intrinsic limitations of individual LEDs. The technique involves varying the spatial pattern of lit LEDs rather than just dimming each LED individually. This allows finer overall dimming levels by combining lower intensity LEDs to create an average brighter appearance. The spatial dimming function is adapted based on factors like the LED strip length, installation orientation, or lamp position to optimize the LED subset activation for a homogeneous light effect.

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A light emitting module with groups of differently colored LEDs arranged in a specific pattern on a circuit board to improve color rendition, color control, and heat distribution. Groups of red LEDs are positioned on the outer circumference, followed by groups of green LEDs, and then groups of blue LEDs in the center. The red LEDs are connected in series, followed by the green and blue LEDs. The number of each type of LED increases as the wavelength decreases. The circuit board has wider traces for the red LED connections.

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Method for adjusting the light output of a vehicle headlight to compensate for variations in LED brightness during manufacturing. The method involves shifting the circuit board with the LEDs relative to the headlight optical assembly. This allows fine-tuning the amount of light coupled into the optical device by adjusting the LED-optic alignment. By adjusting the LED-optic gap, the headlight can emit a consistent light pattern despite LED brightness variations.

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