52 patents in this list

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LED lighting systems in outdoor and high-moisture environments face significant degradation risks, with moisture ingress leading to corrosion of electrical contacts, delamination of optical components, and accelerated lumen depreciation. Field data shows that traditional sealed designs can experience up to 30% light output reduction within 5000 hours of operation in high-humidity conditions.

The central challenge lies in maintaining optical and electrical performance while achieving long-term protection against moisture infiltration without compromising thermal management or serviceability.

This page brings together solutions from recent research—including advanced silicone composite sealants with zinc silanolate, integrated drainage systems for water management, thermally-matched hermetic sealing techniques, and self-heating protective covers. These and other approaches provide practical pathways to extend LED system lifetime in demanding environmental conditions.

1. Light-Emitting Device with Housing Featuring Humidity Control Space and Waterproof Ventilation System

PALITE CORP, PATORAITO:KK, 2023

Light-emitting device with waterproofing and dew prevention. The device has a housing with an internal light source, a cover, and a waterproof/breathable member. The cover forms a humidity control space between it and the housing upper wall. A ventilation hole connects this space to the outside. The waterproof member covers the housing communication hole. This allows moisture inside the housing to escape to the control space and out via the vent. It prevents foreign matter entry while allowing humidity control.

JP2023111303A-patent-drawing

2. Shoebox-Style Outdoor Lighting with Finned Conduction Cooling, Active Fan Cooling, Water Absorption Chamber, Ionizer, and Adaptive Light Sensor

SHENZHEN HUAGUAN OPTOELECTRONIC TECH CO LTD, SHENZHEN HUAGUAN OPTOELECTRONIC TECHNOLOGY CO LTD, 2023

Shoebox-style outdoor lighting with improved moisture resistance and heat dissipation. The lighting has features like fins for conduction cooling, a fan for active cooling, a water absorption chamber at the air intake to dehumidify, an ionizer to purge dust from the lens, and a light sensor to adapt brightness to external conditions.

3. LED Tri-Proof Lamp with Finned Cooling Plate and Sliding Limiters for Enhanced Heat Dissipation and Stability

SHENZHEN HEPAI TECH CO LTD, SHENZHEN HEPAI TECHNOLOGY CO LTD, 2023

LED tri-proof lamp with improved heat dissipation and moisture resistance compared to existing designs. The lamp has a housing with a protective cover, an LED board, and a cooling plate with fins. The LED board is sandwiched between the housing walls and the cooling plate. This allows airflow around the board for cooling. The board is also mounted using sliding limiters that prevent wobbling. This prevents heat buildup and prolongs LED life. The fins dissipate heat further. The housing also has grooves to accommodate the board mounting. The sliding limiters prevent board movement while allowing disassembly.

CN218883734U-patent-drawing

4. LED Power Supply with Sealed Assembly Cavity and Metal Inner Shell for Moisture Protection

SHENZHEN FOSEN TECH CO LTD, SHENZHEN FOSEN TECHNOLOGY CO LTD, 2023

LED power supply with moisture-proof functionality to prevent internal component damage in humid environments. The power supply has a sealed assembly cavity with a moisture-proof inner cavity containing the PCB and components. A metal inner shell suspends in the assembly cavity and has sealing part filled with heat-dissipating sealant covering the PCB and components. This prevents water vapor ingress between the PCB and components, improving reliability and lifespan in humid conditions.

CN218416742U-patent-drawing

5. Light-Emitting Device with Silicone Composite Sealing Member Containing Zinc Silanolate

NICHIA CORPORATION, 2022

A light-emitting device that has improved resistance to discoloration and sulfurization, and thus increased lumen maintenance and lifetime. The device contains a light-emitting element, a conductive member containing silver, and a sealing member that covers the element. The sealing member is made of a silicone composite containing zinc silanolate. The zinc silanolate improves the sealing member's resistance to discoloration and gas permeation compared to conventional silicones.

6. LED Lamp Enclosure with Self-Adaptive Sliding Baffles for Airflow and Waterproofing

JIANGSU SUNRAY TECH CO LTD, JIANGSU SUNRAY TECHNOLOGY CO LTD, 2022

LED lamp with self-adaptive waterproofing and heat dissipation for outdoor applications. The lamp has an enclosure with separate air intake and exhaust channels. A waterproof assembly seals the intake and prevents moisture ingress when there's a lot of water. A water level sensor triggers closing the intake and exhaust when water accumulates. A sliding mechanism moves the waterproof baffles in and out. When water is low, the baffles retract to allow airflow. When water is high, they close to block ingress. This provides adaptive waterproofing without sacrificing heat dissipation.

CN115370981A-patent-drawing

7. LED Point Light Source with Vapor Condensation Management and Heat Dissipation System

HUNAN RAINBOW SOURCE PHOTOELECTRIC SCIENCE AND TECH LIMITED CO, HUNAN RAINBOW SOURCE PHOTOELECTRIC SCIENCE AND TECHNOLOGY LIMITED CO, 2022

Waterproof vapor LED point light source that prevents internal condensation without sacrificing heat dissipation. The light source has a main board with LED points and a lampshade to protect it. A vapor assembly on the main board side near the lampshade has a thermal insulation layer to condense water vapor. A super-hydrophobic film with a diversion groove between the insulation layer and board helps droplets grow on the film instead of inside the lamp. As droplets merge, they leave through the groove without blocking light or heat dissipation.

CN216280713U-patent-drawing

8. LED Light Source Module with Sealed Extension Frame and Adjustable Fixed Shaft

ANHUI RUNCHENG ELECTRICAL AND MECH CO LTD, ANHUI RUNCHENG ELECTRICAL AND MECHANICAL CO LTD, 2021

Moisture-proof and fog-proof LED light source module to prevent failure due to humidity and fog. The module has a fixed column, an extension frame, and a light-emitting seat. The extension frame attaches to the column top and has a fixed shaft. The light-emitting seat has a cover screwed on. This encloses the LED components inside the column and prevents humidity ingress through the open top. The extension frame and cover seal the gaps. The shaft allows adjustment.

9. Water-Tight LED Module with Integrated Lens Array and Compression Seal Mechanism

SCHREDER, 2021

A water-tight LED module design that eliminates the need for a separate gasket to seal the module against water ingress. The module uses a secondary lens array to cover the LEDs, and a lens holder that compresses the lens array against the module base plate to create a seal. The lens array has a peripheral lip that the holder's skirt compresses against the base plate surface. This provides a water tight seal around the LEDs and circuit board.

10. Waterproof LED Light Source Housing with Water-Shielding Frames and Removable Transparent Cover

GUANGZHOU LONGZHU PHOTOELECTRIC TECH CO LTD, GUANGZHOU LONGZHU PHOTOELECTRIC TECHNOLOGY CO LTD, 2021

LED integrated light source with a waterproof housing to prevent water damage when used outdoors. The housing has features like water-shielding frames covering the heat sink holes, a water blocking ring around the LED board, and a removable transparent cover held by an intrusion bar. This prevents water from entering the housing through the holes and shields the LED board. The removable cover allows access for maintenance.

CN213686316U-patent-drawing

11. LED Lighting Equipment Housing with Inverted Cone Structure, Gas Exchange Valve, and Integrated Water Leakage Detection

Shenzhen Dart Culture and Technology Co., Ltd., SHENZHEN DART CULTURE TECHNOLOGY CO LTD, 2021

Waterproof protection device for LED lighting equipment with improved reliability through a combination of structural and material waterproofing. The device uses an inverted cone housing with a gas exchange valve, an LED drive unit, a water leakage detection circuit, and a base. The gas exchange valve allows venting to prevent pressure buildup. The water leakage detection circuit cuts power if water is detected. The housing shape prevents water entry while the vent prevents internal pressure issues. The valve combines a breathable membrane with a mechanical structure to enhance sealing reliability. A base seal with limiting flanges prevents horizontal movement. Heat dissipation protrusions and channels help condensate management. The wire tube connection with a tapered plug provides hermetic sealing.

12. Enclosed LED Module with Waterproof Structure and Integrated Heat Dissipation

K I A D, KIAD, 2021

Waterproof LED lighting system for indoor and outdoor use that prevents condensation and allows easy series/parallel connection. The lighting system has an enclosed LED module case with a waterproof structure. Inside, an LED module is mounted and covered by a diffusion panel. A side cover seals the ends. This prevents moisture ingress. The case has heat dissipation means. A moisture-absorbing material inside absorbs any moisture that does enter. The lighting devices can be connected in series or parallel for flexibility. Each unit has independent control.

13. LED Lighting Device with Detachable Covers and Integrated Moisture Control Features

K I A D, KIAD, 2021

Waterproof LED lighting device with detachable covers to allow easy installation and maintenance in both indoor and outdoor environments. The device has a case, a coupling part, an inner space, and covers. The case has a fixing portion and a lower coupling portion. The inner space holds the control board. Both ends of the case have openings. The side cover seals the openings and has a foldable portion. The diffusion cover surrounds the coupling part. The covers can be opened and closed to connect adjacent devices in series or parallel. The device also has features like moisture-absorbing, heat dissipation, and waterproofing to protect the LEDs and board from moisture and condensation.

14. Enclosed LED Light Source Module with Electromagnetic Defogging and Integrated Wiper Mechanism

JIANGMEN OUYUE TECH LIGHTING CO LTD, JIANGMEN OUYUE TECHNOLOGY LIGHTING CO LTD, 2021

Moisture-proof and fog-proof LED light source module to prevent water droplets and fog from affecting the lighting performance of the LED module in low temperature or dense fog conditions. The module has an outer support rod connected to the LED pole, with a light box, transparent plate, heat sink, driver, motor, threaded rod, threaded block, moving block, connecting plate, sliding block, fixed plate, electromagnet, fixed iron plate, defogging plate, wiping cloth, rolling block, and solar panel components arranged inside. This enclosed design with moving wipers and electromagnetic defogging prevents moisture ingress into the LED light source.

15. Outdoor LED Light Module with Sealed Housing and Multi-layer Waterproofing Mechanisms

FUJIAN SHANGHANGYADA ELECTRONIC TECH CO LTD, FUJIAN SHANGHANGYADA ELECTRONIC TECHNOLOGY CO LTD, 2021

An outdoor waterproof LED light source module to prevent water ingress and improve the life of LED lights used in outdoor applications like portable lamps, emergency lamps, table lamps, flashlights, etc. The module has multiple waterproof measures to prevent water from entering the light source. This includes a sealed housing, waterproof connectors, silicone seals around the LED board and components, and gaskets around the lens. The module's waterproof design prevents water seepage into the internal circuitry to avoid damage and extend the LED light's service life in outdoor environments.

CN212456333U-patent-drawing

16. Hermetically Sealed LED Housing with Metal Cap and Thermal Expansion Matching

SCHOTT AG, 2021

A hermetically sealed LED light for use in medical instruments. The LED light has a housing that is at least liquid-tight. The housing includes a base with LEDs and a metal cap with windows. The cap is attached to the base to seal the LEDs inside. A coating is applied to the cap to enhance sealing. The cap is made of stainless steel with similar thermal expansion to the base material to prevent leaks.

US10890318B2-patent-drawing

17. LED Power Supply Enclosure with Open Gap and Through-Hole Ventilation Design

Tongling Maiwei Electronic Technology Co., Ltd., TONGLING MAXWELL ELECTRONIC TECHNOLOGY CO LTD, 2020

LED power supply enclosure with improved heat dissipation and moisture resistance. The enclosure has a unique design with an open gap between two connected housing sections. This gap allows natural convection cooling and prevents moisture buildup inside. Through holes in one housing section allow airflow. The enclosure also has an end cover and internal mounting board. This configuration provides better heat dissipation and moisture resistance compared to traditional sealed boxes.

CN108332167B-patent-drawing

18. Lamp Housing with Sealed Electronics Module and Integrated Drainage Channels

NGL GLOBAL LIMITED, Jensen-Tomy T K Lai, 2020

A lamp that can effectively discharge water or liquid that gets into the lamp housing and prevent sensitive electronic components from getting exposed to the outside when servicing the lamp. The lamp has a separate sealed lamp module that contains the electronics, which can be mounted and sealed into an outer case. The outer case has drainage channels to allow any moisture that gets inside to flow out. The separate module can be accessed by opening the rear cover of the outer case without exposing the electronics to the elements.

US10801715B2-patent-drawing

19. Outdoor Lamp Housing with Honeycomb Heat Dissipation and Integrated Moisture Sensing System

SHANDONG XUCHENG LIGHTING TECH CO LTD, SHANDONG XUCHENG LIGHTING TECHNOLOGY CO LTD, 2020

Moisture-proof and water-ingress outdoor lamp design that prevents water and moisture from entering the lamp housing and circuit board, and automatically eliminates any detected water vapor. The lamp has a heat dissipation and moisture-proof structure on the bottom with honeycomb holes and a moisture-proof paint coating. It also has an internal water vapor sensor, microprocessor, and fan that can detect and blow out any moisture. This ensures the dryness inside the lamp housing and around the circuit board to prevent water damage.

20. LED Module with Directional Light and Spectrum Matching for Plant Growth

Industrial Technology Research Institute, 2020

LED light source module for plant growth applications that provides directional light, improved spectrum matching for photosynthesis, and waterproofing. The module has an LED board with multiple LEDs facing up or down, an optical reflector to redirect the light, a waterproof cover, and a pole with a power supply.

US10634295B2-patent-drawing

21. Lamp with Drainage Channels and Sealed Lamp Module for Water Egress and Component Protection

22. LED Lighting Fixture with Dual-Shell Construction and Integrated Waterproof Films

23. Sealed LED Power Supply with Integrated Water Cooling and Moisture Barrier

24. LED Module with Integrated Lens Assembly for Water-Tight Sealing

25. Underwater Lamp Housing with Double Curvature Shell for High Pressure Resistance

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Innovative solutions for moisture-resistant LED lighting are demonstrated by the patents included here. These solutions help to progress the technology of LED lighting, ranging from enhanced sealing materials and waterproof designs to innovative heat dissipation and moisture management.