Energy Efficient Techniques for LED Lighting Systems

An LED lamp design enabling high-power LEDs to operate without external heat sinks. The design features a cylindrical transparent housing containing LEDs mounted on a flexible PCB rolled up inside. A thin transparent layer coats the PCB to protect the LEDs. The rolled PCB, along with the LEDs and driver components, is enclosed within the housing, allowing efficient heat dissipation directly into the surrounding air through the transparent housing.

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LED tube lamp with improved thermal management and reliability. The lamp has a glass tube with a diffusive layer. Inside, an LED light strip is attached by glue. The light strip has connecting pads at one end. LED light sources are mounted on the strip. A circuit board with components like a rectifier and filter is stacked against the strip end. The board is partly inside an end cap. This design allows better heat dissipation from the strip and components compared to traditional LED tube lamps.

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Lighting apparatus with an integrated anion generator for air purification that has a non-powered ventilation structure to provide effective heat dissipation from the LED chips. The lighting apparatus includes an anion generator inside the housing, an open-ended cylindrical anion-emitting tube that protrudes from the housing, a discharge electrode inside the housing opposite the tube opening, an LED circuit board above the housing, and a cover that only partially encloses the tube. Air holes allow outside air into the tube when anions are emitted, creating airflow that also cools the LEDs. The anion generator and vented tube provide air circulation without fans to dissipate LED heat.

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LED luminaire housing that uses a biodegradable plastic base to enclose the LEDs and driver. The bioplastic is designed to be suitable for LED luminaires, providing sufficient strength to enclose the LEDs and withstand the heat and environmental conditions. The bioplastic is made from materials like cellulose acetate, polylactic acid, polyhydroxyalkanoates, or thermoplastic starches.

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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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LED lighting device with improved cooling and modular construction to simplify assembly. The device has a lamp cap, case, power supply, heat exchange unit, and light emission unit. A buckle allows connecting the case and heat exchanger without bolts. The light emission unit connects to the heat exchanger for efficient heat transfer.

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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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A low-cost light-emitting device that can be used to create LED filament lamps that look like traditional incandescent bulbs. The device emits light in a spiraling pattern from a central elongated light guide. This guide has light in-coupling and out-coupling elements to efficiently capture and guide the light. The key features are collimating surfaces that maintain the spiraling light pattern and twisting the guide like a screw to enhance the appearance. This provides a cheaper, tunable, and clearer white light option compared to existing LED filament lamps.

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An LED lighting device that maximizes thermal coupling between the LED and heat sink to improve heat dissipation and reliability. The device has a recessed PCB that surrounds the LED module mounted on the heat sink. The PCB provides electrical control circuitry and the recess allows the LED to directly contact the heat sink.

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An eye-safe light source that improves 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 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 luminaire design that maximizes light extraction from phosphor conversion materials in LED lighting. The luminaire uses a remote phosphor element that scatters light from the LED and a total internal reflection (TIR) extractor element to capture and extract the scattered light. The extractor has a TIR surface that receives scattered light directly from the phosphor and guides it to the exit surface for extraction. The TIR surface reflects light at angles greater than the critical angle for total internal reflection. This allows efficient extraction of converted light that otherwise scatters in random directions from the phosphor.

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Heat dissipation device for LED vehicle headlights that provides effective cooling with flexible fins for better fitting within the limited space of a headlight assembly. The device has a base, vertically stacked heat conducting fins radiating outward, and an LED module coupled with the base. The fins are made of flexible aluminum to be bent and distorted to fit into the headlight housing.

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Heat dissipation device for an LED lamp with flexible fins to fit into confined spaces for applications like vehicle headlights. The device has a base, an LED module, and vertically stacked heat conducting fins that radiate outward. The fins are made of flexible aluminum that can be bent to fit in tight spaces. This allows better heat dissipation compared to rigid heat sinks.

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Flexible heat dissipation device for LED vehicle headlights that can fit into the confined headlight assembly and effectively dissipate heat. The device has a base, vertically stacked flexible aluminum fins radiating outward, an LED module, and a wiring loom. The flexible fins can be bent to fit into the headlight housing. The fins conduct heat away from the LED and increase the dissipation area.

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A compact lighting device that provides high brightness in a small form factor using multiple LEDs. The device has a package structure enclosing the LEDs with a volume less than 5000 mm3. The encapsulated LEDs are mounted on a board. This enables a high lumen output of over 150 lumens from a very small package size, suitable for applications where intense lighting is needed in a confined space.

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Light engine for an LED light source that is lower cost, modular, and allows AC power input without complex circuitry. It achieves this by using multiple insulated substrates for the LEDs, driver circuitry, and protection, all bonded together. The LED elements are mounted on a substrate, with circuit substrates contacting it to apply voltage, and protection substrates surrounding all of it. This provides insulation between components and prevents shorts. The bonded substrates form a modular light engine that can be easily manufactured and scaled.

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Solid state light emitter lamps that can be easily substituted for conventional lamps like incandescent lamps. These retrofittable lamps have solid state light emitters like LEDs mounted on heat sink structures and circuit boards. The heat sinks have foldable regions allowing the lamps to fit within the envelope of a conventional lamp. The heat sink foldable regions enable compactness and flexibility while still providing effective heat dissipation for the LEDs.

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Solid state lighting device with enhanced color quality and efficiency. The lighting device includes multiple groups of light emitting diodes (LEDs) that emit at different wavelengths, and luminescent materials that convert some LED emissions to other colors. The LED and luminescent groups are selected so that the combined light produces a white light with color coordinates matching a specific range on the blackbody locus. This provides improved color rendering and contrast compared to conventional LED lighting.

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LED module with customized connection of series parallel circuits to achieve uniform thermal loading of LEDs for optimum heat dissipation and reliability. The number of LEDs in the parallel circuits is varied based on their position on the circuit board. Fewer LEDs are connected in parallel in the central region compared to the edge regions. This reduces the current and heat in the center where cooling is poorer.

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