Phosphor-Coated Laser Spotlight System for Vehicle Illumination
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Solution Overview
Problem
Conventional vehicle illumination systems, such as headlights, lack the ability to produce a high-intensity, narrow spotlight that can be directed and controlled dynamically, especially in response to environmental factors or operator input, limiting their effectiveness in specific lighting scenarios.
Innovation Solution
A system that incorporates a phosphor layer coated light source, a laser emitter, and a controller to direct a laser beam onto the phosphor layer, enhancing luminous intensity and allowing for steerable and adjustable spotlight production, using components like GaN-based LEDs, cerium-doped yttrium aluminum garnet, and europium doped nitridoaluminate phosphors, with optical elements and sensors for environmental and operator feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional headlights are used, then the illumination system is simple and reliable, but the luminous intensity and focusability are insufficient
Solution Approach 1:
The patent combines a laser emitter, phosphor layer, and controller into an integrated illumination system. The laser beam excites the phosphor material to generate high-intensity light, merging multiple components to achieve both high luminous intensity and directional control that conventional headlights cannot provide
Solution Approach 2:
The system changes the operating parameters by using laser excitation instead of conventional bulb illumination. The laser beam can be directed to specific locations on the phosphor layer, allowing control over the direction and focus of the emitted light, thereby achieving high luminous intensity with adjustable beam characteristics
2Adaptability or versatility
If conventional headlights are used, then the system is easy to manufacture, but the ability to direct and control the beam dynamically is limited
Solution Approach 1:
The patent implements dynamic beam direction control by enabling the laser emitter to direct the laser beam to different locations on the phosphor layer based on environmental factors or operator input. This dynamic adjustability allows the system to adapt to various lighting scenarios while maintaining manufacturability through integrated component design
3Power
If high laser power is used to increase luminous flux, then the spotlight intensity increases, but the risk of damaging the phosphor layer increases
Solution Approach 1:
The controller monitors the illumination system's operation and adjusts the laser beam parameters accordingly. By implementing feedback control, the system can optimize laser power delivery to maximize luminous flux while preventing excessive power that would damage the phosphor layer, thus maintaining reliability
Solution Approach 2:
The system can employ periodic or pulsed laser excitation rather than continuous high-power illumination. This allows the phosphor layer to dissipate heat between pulses, enabling high average luminous flux while preventing thermal damage to the phosphor material
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 system generates a spotlight with luminous intensity exceeding traditional headlight outputs, providing a focused and adjustable beam that can be directed based on environmental conditions or operator input, enhancing visibility and safety.
Implementation Method 1
The laser beam excites the location on the phosphor layer to produce a spotlight at the location... the phosphor layer may be configured to convert the blue light to white light
Data Source
AI summary
An example system includes a light source coated with a phosphor layer, a laser emitter to output a laser beam, and a controller to control a direction of the laser beam so that the laser beam hits a location on the phosphor layer. The laser beam excites the location on the phosphor layer to produce a spotlight at the location.