High Luminance LEDs in Lighting Applications

Backlight source structure for LED lamps that improves brightness, utilization, and efficiency of LED lamps. The structure has a light source component, a uniform light component, and a second reflective component. The light source emits light in a direction. The uniform light component converts the point light to surface light and reflects back to surrounds. The second reflective component around the light source gathers and re-emits the reflected light parallel to the emission direction. This concentrates the light to increase brightness, utilize more of the emitted light, and reduce source waste.

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Tunable white light LED device that provides high-quality light with adjustable color temperature and enhanced color rendering for applications like circadian lighting. It uses a combination of three LED strings (blue LEDs with phosphor coatings), each with a different color phosphor, to generate unsaturated light of different colors. These unsaturated light spectra are mixed to create a tunable white light that can be adjusted along the black body locus of correlated color temperatures. The device uses a drive circuit to adjust the relative currents to the LED strings and achieve the desired color point.

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An LED lamp design that allows high-power LEDs to be used without requiring external heat sinks. This is achieved by using a cylindrical transparent housing with the LEDs mounted on a flexible PCB rolled up inside. The PCB is coated with a thin transparent layer to protect the LEDs. The rolled PCB, LEDs, and driver components are all contained within the housing. This allows the LEDs to dissipate heat directly into the surrounding air through the transparent housing.

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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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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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High-intensity lighting device using copper-nickel heat-conducting films to efficiently dissipate waste heat from LEDs and allow compact, high-intensity illumination. The device has a thermal film assembly with LEDs, optical reflector, and metal frame. The copper-nickel films guide heat from the LEDs to the heat sinks. The LEDs are grouped and focused by the reflector for higher light output. The compact design allows cost-effective high-intensity lighting compared to conventional LEDs.

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LED luminaire with improved light output and compact design by using a reflector with a slot to redirect light from an external LED source into an internal optical element. The LED is mounted outside the reflector, which has a slot for the light guide to pass through. The light guide directs the LED light into the reflector, where it exits at an angle relative to the light guide direction due to the reflector geometry. This avoids high brightness spots and improves light distribution compared to directing the LED light straight into the optical element.

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High heat dissipation LED headlight that emulates the light output of halogen lamps while improving heat dissipation compared to conventional LED headlights. The key innovation is placing the LED near the heat sink instead of at the light source end. A concentrator converts the LED light into parallel beams and adjusts the spot size. This allows close proximity of the LED to the heat sink for better dissipation. The concentrated light is then transmitted to the fluorescent glue layer, which glows white. The close LED-heat sink placement and light concentration enable effective heat transfer while maintaining brightness equivalent to halogen lamps.

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Light guide structure for realizing high brightness of a low-power LED. The structure includes a support and a condenser, wherein the PCBA is arranged at the top of the support, an LED lamp wick is installed at the top of the PCBA through a mounting seat, the condenser is arranged on the outer side of the top of the PCBA, an optical reflecting mirror surface is glued inside the condenser, and a light guide column is sleeved at the top of the condenser.

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High-emissivity LED light source for applications like surgical lighting and microscopy that provides high radiation, adjustable color temperature, and stable color rendering over time. The source uses multiple LED dies of different colors arranged in a cone shape. Closed-loop control adjusts the intensity of each color channel to maintain consistent color rendering and color temperature as the LEDs age and temperature changes. The conical geometry and closed-loop control overcome limitations of conventional LED sources like fixed CCT and CRI degradation. The high-emissivity LEDs can be coupled to fiber optics for surgical lighting.

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Lighting apparatus with high intensity, small volume package, and high-efficiency LEDs. The apparatus includes a board with multiple small LEDs mounted on it and an enclosure that houses the LEDs. The enclosure has a volume of less than 5000 mm3 and protects the LEDs while maintaining high light output.

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LED lighting device with uniform light output by using a distribution reflector below the LED mounting area and a main reflector above it. The LED looks down at the distribution reflector below, then the light is reflected by the distribution reflector up to the main reflector above. This evenly divides and reflects the light throughout the main reflector to brighten the entire area without dark spots.

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Light-emitting diode (LED) designs with improved light extraction and control. The LED structures have an optical surface coupled to the semiconductor junction to output light. The optical surface can have features like gratings, prisms, or index gradient layers to increase light extraction. It can also have redirecting structures like slanted grating arrays to steer the light. This allows capturing more light generated inside the semiconductor and directing it for better efficiency and applications like collimation.

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Light emitting device packages and lighting device designs that aim to improve the light intensity of LED devices. The design includes using insulating reflective layers on the electrodes of the LED device to reduce light absorption and improve light output. The insulating layers are applied to selected areas of the electrodes to expose contact points while reflecting light.

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A light-emitting device that provides a large circular light-emitting region with increased brightness in the center by using a central LED unit surrounded by smaller peripheral LED units. The central unit has a larger light-emitting region area compared to the periphery units. This configuration increases the overall light-emitting region size while concentrating more light at the center. It avoids yield issues of making a single large LED and prevents overheating a large substrate.

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A white light device architecture based on an orange nanowires LED combined with a narrow linewidth blue laser diode for simultaneous illumination and optical wireless communication. The orange nanowires LED provides tunable white light with high color rendering. The blue laser diode enables high-speed data transmission. This hybrid LED/laser system offers improved efficiency, color quality, and data rates compared to conventional phosphor-based white LEDs. The orange nanowires LED has a broad linewidth that fills the spectrum for better color rendering.

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High power density solid-state lighting modules that can produce focused, intense light output for applications like curing polymers, sterilization, cleaning, and material ablation. The lighting module uses dense arrays of solid-state light-emitting diodes (LEDs) on a thermally conductive substrate. The LEDs can be driven at high power to achieve the required power densities. The module allows solid-state lighting to replace high-intensity arc lamps for applications requiring high power density irradiation.

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LED package for motor vehicle lamps that has improved brightness and luminous flux performance compared to conventional packages. The package contains a LED, an optical element, a cover, and optical reference marks. The marks on the optical element and cover are aligned to a reference mark on the substrate or heat sink during assembly. This precise alignment improves the optical performance of the LED package. The marks can be detected and aligned using an optical system during manufacturing.

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An illumination method that creates natural, vivid, highly visible and comfortable color appearances by optimizing the light spectrum for objects. The method involves illuminating objects with light that, when measured at the object position, matches specific criteria for hue, saturation and color temperature compared to a reference light. This recreates natural color appearances indoors under typical lighting conditions. The illumination is achieved using light emitting devices such as LEDs with specific spectra. The method aims to provide favorable color appearances under moderate indoor lighting conditions while maintaining energy efficiency.

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An LED collimated light source that provides high-intensity, directional light from a compact, low-profile package. The collimated light source uses a light guide component with a central LED module surrounded by layers that guide and collimate the light. The layers include a light guide glass, a light gathering layer, a hollow layer, and a transmission layer. The hollow layer has zigzag edges that guide the light to the transmission layer. This collimates the light from the central LED into a narrow beam. The collimating component replaces the reflector and optics in a conventional LED fixture, reducing size and weight.

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LED light emitting device that combines multiple LED sources into a compact high quality light source. The device uses a single light guide element adjacent to the LED output surfaces to efficiently collect the emitted light and guide it to an output surface. A transparent collimating element captures the guided light and reflects any escaping light back into the guide.

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LED light source module with a light collecting device to improve the lighting efficiency and output of LED lamps by concentrating the light emitted by the LEDs. The module has a lamp tube with a light collecting mechanism inside. The mechanism has an optical plate with a sawtooth-shaped incident surface at the top and a reflective surface at the bottom. A reflective layer between the surfaces bounces the light back and forth. This concentrates and directs the light emitted by the LEDs mounted inside the lamp body.

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A lighting device using LED matrices that improves heat dissipation, thermal stability, and light distribution compared to conventional LED matrix arrays. The device has a cylindrical hollow body with an optical fiber inside. The LED matrices are mounted on the outer surface of the fiber. The fiber has a parabolic depression at one end. The LED matrices are positioned with their centers at the focal points of the parabola. This reflects their light into the parabolic depression and out the other end through the fiber. The parabolic shape concentrates and directs the LED light. The hollow body and fiber provide efficient heat conduction. This avoids the issues of heat dissipation and uneven brightness that arise with spaced matrix arrays.

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A small form factor LED lighting apparatus with high intensity. The lighting apparatus has a volume less than 5000 mm3 and a light intensity greater than 150 lumens. The compact size makes it suitable for applications where space is limited. The apparatus achieves high brightness from multiple LEDs enclosed in a small package.

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A thinner LED lighting device with improved brightness and reduced hotspots. The device uses a separation region between the first reflective member (e.g., metal) and second reflective member (e.g., transparent) to prevent light concentration and hotspots. The separation region is formed below the LED source to direct light uniformly. The device also has an optical pattern layer with an adhesive to further diffuse and disperse the light.

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Modular LED light fixture system with arc-shaped array to achieve high intensity illumination and full spectrum for horticulture and other applications. The system uses LED modules arranged along a curved housing that focuses their light output into a concentrated illuminated area. The modules can be adjusted to converge their light patterns. The fixture allows customization of LED colors and lenses.

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LED lighting device that provides uniform, highly directional light from a wide area. The device uses a stacked structure of layers above the LED chips. The layers scatter and condense the LED light. A scattering layer above the LEDs scatters the light. A gap between the LED chips and scattering layer prevents internal reflections. A condensing layer above the scattering layer further concentrates the scattered light. This avoids internal reflections and spectrum changes. A fluorescent layer below the scattering layer absorbs and converts some LED light. The protective layer covers the device. The vertical distance between the LED chips and scattering layer is 5x the horizontal chip spacing.

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LED lighting with high color rendering index (CRI) and adjustable color temperature. The LED array contains multiple strings, each comprising several LED chips of potentially different wavelengths, with each string controlled electronically as a separate channel. Phosphors of multiple types and emissions spectra are dispensed or applied on top of all of the individual LED chips, such that it is possible to have a different phosphor type on each individual LED chip, or on different subsets of the LED chips. The multiple channels allow for each string of LEDs and hence their output color and power to be independently switched on/off and varied in intensity, respectively. This allows the LED illuminator to provide variable or adjustable color temperature (CCT), while maintaining extremely high CRI.

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Integrated illumination device that combines an optical guide with a thermal guide to improve efficiency and cooling of LED-based lighting. The optical guide receives and distributes light from the LED source, while the integrated thermal guide conducts heat away from the LED to cool it. This eliminates the need for external cooling components like fans or sinks. The combined optical and thermal guides provide efficient light distribution and cooling in a compact and integrated package.

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Lighting device with a high output from a small LED source. The device uses a unique light guide geometry and internal components to efficiently transfer the LED light into the guide and maximize output at the end. The light guide has a section with increasing cross-section that transforms incoming angled light rays to more parallel for better transmission through the narrow guide fibers. This section has a reflective inner surface. It connects to a second section surrounded by a light absorbing material. The absorber has high thermal conductivity to dissipate heat. This configuration allows high light output from the guide end while reducing thermal stress at the LED input.

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Large format high brightness LED light box with ultra-thin profile using total internal reflection. The light box has a divergence plate, light guide plate, and LED light source. The divergence plate has engraved divergence points. The light guide plate has a beveled edge. The LED light enters the light guide plate from the side, reflects internally due to total internal reflection, and exits through the beveled edge into the divergence plate. This separates the light divergence and entry functions into separate components. The divergence angle of the LED and bevel angle are optimized for maximum brightness and large format. A shading layer between the light guide plate and diffuser prevents seeing the LEDs from the side.

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LED lighting device with improved light distribution, illuminance and heat dissipation efficiency. The device uses a unique heat sink design with internal heat dissipation rods to efficiently conduct heat generated by the LEDs to the exterior heat sink. The LEDs are mounted on a ceramic plate that insulates them while also conducting heat to the heat sink. The lighting module has curved reflector shades that reflect and collect light multiple times for maximum illumination. This allows brighter output with less power compared to traditional LED fixtures.

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A lighting device with a COB (chip on board) LED module that provides uniform light by distributing and reflecting the high intensity light from the COB module. The device has a main body with a COB LED module mounted on it. An optical member on the front of the COB module guides some light to the sides. An inclined reflective member at the bottom reflects the side light downward. This prevents point sources and provides more even illumination. The main body, COB module, and cover surfaces are also reflective.

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Reducing contrast between bright LEDs and surrounding surfaces in lighting fixtures. The solution involves using light waveguides to capture and re-emit some of the light from high brightness LEDs. This creates a surrounding structure with reduced contrast compared to the original LED brightness. The waveguides have channels behind the LEDs where some of the light is captured. Internal reflections keep the light in the waveguide. An extractor surface at the front of the waveguide emits the captured light to reduce contrast between the LEDs and surrounding surfaces.

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Illumination system with light recycling to increase brightness. The system uses devices to recycle light emitted by the light source like LEDs. Spatial recycling reflects light back into the source using coatings, pipes, or reflectors. Angular recycling reflects light at different angles back into the source using lenses, reflectors, or tapers. This increases brightness by preventing waste of high-angle light and reusing it. The devices couple light between input and output ends.

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A compact and efficient LED lighting solution that integrates cooling into the optical guide for higher performance and reduced size. The design involves combining the optical guide that distributes the LED light with a thermal guide for heat conduction from the LED source. This integrated guide provides both optical and thermal functionality, eliminating the need for separate heat sinks or fans. The discontinuous taper shape of the guide allows efficient light extraction while still facilitating thermal conduction. The integrated guide cools the LED source more effectively compared to separate optical and thermal components.

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LED light source with diffuser for uniform, glare-free illumination from large area LED arrays. The light source uses a thin diffuser with graded scattering layers on a highly reflective substrate. This achieves uniform, diffuse light extraction without the need for complex, thick optics. The graded scattering layers have different scattering properties to reduce light reflection back into the LEDs above the array and increase light scattering away from the LEDs. This prevents hotspots and glare. The thin diffuser is bonded to a reflective substrate with high reflectance LEDs to leverage internal reflections and channeling effects for efficient, uniform light extraction. The LEDs are also embedded in an index-matching host material to increase extraction.

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Integrated light guide and heat guide for high efficiency LED lighting devices. The design aims to improve optical and thermal performance of LED lights while reducing complexity and cost compared to conventional solutions. The light guide has an edge-mounted LED source and a flared or closed shape to distribute the light internally. The heat guide is an external structure that conducts heat from the LED source to dissipate it. This allows efficient light extraction and heat removal without fans, sinking, or complex optics.

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Improving the performance of LEDs by increasing light extraction efficiency and reducing absorption. The techniques involve coating the LEDs with a high refractive index organic-inorganic hybrid material to scatter light and make it easier to escape. The LEDs are also nanotextured to further chaoticize the light path and increase extraction. This is done by generating fractal patterns, dispersing particles, or modifying the surface. The LEDs can also be debonded and rearranged onto new substrates with improved heat dissipation. The goal is to achieve higher external quantum efficiency and brightness compared to traditional LEDs.

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Ducted lighting system with a single-file light engine arrangement for high-performance, efficient, and compact lighting systems in applications like architectural lighting and LED replacement. The ducted lighting system has a collimated light engine with components arranged sequentially in a single file: a collimator, LED light source, and heat sink. This allows compact, high-lumens-per-watt lighting that can be transported long distances in mirror-lined ducts with low attenuation and weight. The collimator shapes the light beam for ducting, reducing divergence and scattering. The single-file arrangement enables compact heat dissipation and simplifies duct installation.

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LED lighting module with uniform illumination and simple structure. The module has collimated and diffused LED light beams for uniform illumination. It has a collimating optical element for collimated LEDs and a diffusing optical element for diffused LEDs. This allows merged collimated and diffused beams for uniform illumination instead of separate beams. The module has simplified optics compared to individual lens elements per LED. It also enables better heat dissipation since all LEDs share the collimating optics. The luminaire has multiple of these modules for efficient uniform lighting.

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LED luminaire using a high-reflectivity and high-thermal-conductivity sheet to improve efficiency and lifespan compared to conventional LED tubes. The LED board is directly fixed to the reflective sheet instead of a separate reflector. This allows light to be reflected and emitted in all directions from the sheet itself. The sheet also acts as a heat sink to dissipate heat from the LED board. The sheet is made of high-reflectivity and high-thermal-conductivity material like aluminum.

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Reducing brightness contrasts between high-brightness LEDs and surrounding surfaces in luminaires to improve visual comfort. The technique involves using light waveguides to surround the LEDs and capture some of the light. This captured light is then extracted through the front surface of the waveguide to create surrounding brightness that reduces contrast compared to the LEDs. The waveguide openings can be configured to manage brightness and cutoff angles. Secondary optics can also be added to control the light distribution from the openings.

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High brightness LED light source with improved color mixing and increased brightness by using a tapered silica gel layer to diffuse and mix the light from multiple colored LEDs. The LEDs are arranged in specific tapered recesses in the silica gel layer. This involves installing red, green, blue, and white LEDs in separate tapered recesses in the silica gel layer. The tapered shape of the recesses diffuses and mixes the light from each color to create a more even and mixed output. The silica gel layer is expanded between the LEDs and a heat sink to provide cooling.

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LED lighting panel with narrow beam angle and adjustable output angle. The panel has a transparent base with prism structures on one side and an LED on the other. A transparent guide layer encapsulates the LED. The prism structures extract light from the LED at angles determined by their shape. This provides a narrower beam compared to the wide angle output of the LED alone. The prism structures also allow adjusting the output angle. The guide layer guides the light through the base. This allows extracting a focused beam from wide angle LEDs without external optics, improving efficiency and lifetime compared to lens systems.

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A modular LED lighting system with adjustable light output and color temperature. The system allows customization of lighting characteristics by interchanging reflector elements between rows of LEDs. This allows different lighting units to have optimized light distribution for their application. The system also has a light sensor and data processing to dynamically adjust LED brightness based on ambient light levels. This provides energy savings by reducing output when adequate daylight is present.

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