Lighthouse Lantern Laser Diode Phosphor Emitter Marine Corrosion
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Solution Overview
Problem
Conventional lighthouse lanterns using incandescent lamps require frequent maintenance due to inefficient power use and have reduced brightness due to LED module stacking, and are prone to failures from corrosion when used near seawater.
Innovation Solution
A lighthouse lantern design incorporating a laser diode, a phosphor-containing emitter, and symmetrical reflective structures that emit light in multiple directions, improving power efficiency and reducing corrosion risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED modules are stacked to increase luminance, then the luminous intensity of individual LED modules is higher, but the light emitting area is narrowed and overall brightness is lowered
Solution Approach 1:
The patent transitions from planar LED module stacking to a three-dimensional spherical emitter structure. The laser beam excites phosphors distributed throughout the volume of the sphere, creating light emission in all directions simultaneously, thereby increasing the effective light emitting area while maintaining high luminous intensity.
Solution Approach 2:
The patent changes the physical state and distribution of phosphors from discrete LED chip structures to a continuous phosphor-containing emitter medium. By dispersing phosphor particles throughout the spherical volume and exciting them with a laser, the system achieves uniform light emission from the entire surface area of the sphere.
2Adaptability or versatility
If conventional LED modules are used near seawater, then the lighthouse lantern can operate in marine environments, but corrosion of the LED module causes frequent failures
Solution Approach 1:
The patent extracts the LED module structure entirely and replaces it with a laser-diode-driven phosphor emitter system. This eliminates the corrosion-prone LED components while maintaining the light generation function, thereby improving reliability in marine environments without sacrificing adaptability.
Solution Approach 2:
The patent employs a composite structure consisting of a spherical emitter containing phosphor particles dispersed in a transparent matrix material. This composite design allows for corrosion resistance while maintaining optical performance, suitable for marine environment operation.
3Illumination intensity
If incandescent lamps are used in lighthouse lanterns, then the lantern can provide sufficient light output, but inefficient power use requires frequent inspection and maintenance
Solution Approach 1:
The patent replaces the thermal radiation mechanism of incandescent lamps with a photoluminescence-based light generation system. A laser diode excites phosphors that convert the laser energy to visible light, achieving much higher power efficiency while maintaining or exceeding the light output of incandescent systems.
4Strength
If LED modules are pressed by cover plate, then the LED structure is secured, but the lens portion is deformed and luminous intensity is reduced
Solution Approach 1:
The patent moves from a two-dimensional planar LED module configuration to a three-dimensional spherical emitter. The spherical geometry naturally distributes mechanical stresses uniformly in all directions, eliminating the deformation problems associated with planar structures under cover plate pressure while maintaining structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design achieves high output with low input power, reducing maintenance needs and production costs while minimizing failures near seawater.
Implementation Method 1
a laser diode configured for receiving power from the power supply and irradiating laser in one direction
Implementation Method 2
a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light
Data Source
AI summary
A lighthouse lantern comprising a power supply and a phosphor-containing emitter is disclosed. The lighthouse lantern includes a power supply; a laser diode configured for receiving power from the power supply and irradiating laser in one direction; a phosphor-containing emitter positioned on a traveling line of the laser, wherein the emitter is configured for receiving the laser and emitting light; and a pair of reflective structures disposed symmetrically with respect to the phosphor-containing emitter, wherein each reflective structure has a reflective surface inclined in a direction away from the phosphor-containing emitter, wherein the reflective surfaces of the reflective structures are symmetrical with each other with respect to the phosphor-containing emitter. In accordance with the present disclosure, the lighthouse lantern may generate high output with low input power and thus has improved power efficiency, may suppress frequent failures near sea or seawater, and may reduce production costs.