Cylindrical White Laser Diode Packaging With Fluorescent Conversion
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Solution Overview
Problem
The widespread adoption of white laser diodes is hindered by complex and costly packaging structures and high power consumption, making it difficult to mass-produce devices that couple red, green, and blue laser light into a white laser beam effectively.
Innovation Solution
A cylindrical white light laser diode package structure featuring a blue-light laser chip projecting a blue laser beam onto ceramic fluorescent powder, which generates a white beam through physical excitation, utilizing a base with a concave groove and a seat bar for fixing the chip, and a light transmissive cover to enhance reflection and concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If red, green, and blue laser light is coupled into a white laser beam using traditional packaging structures, then white light is produced, but the packaging structure becomes complex and costly
Solution Approach 1:
The patent extracts the white light generation function from complex multi-color laser coupling by using a single blue laser chip excitation structure. The blue laser chip is positioned to excite fluorescent powder through a transparent substrate, eliminating the need for complex packaging structures required for coupling multiple laser colors.
Solution Approach 2:
The patent introduces fluorescent powder as an intermediary medium between the blue laser chip and the output light. The fluorescent powder converts blue laser light into white light through photoluminescence, serving as a mediator that simplifies the overall system architecture and packaging structure.
2Illumination intensity
If red, green, and blue laser light is coupled into a white laser beam, then white light is produced, but manufacturing difficulty increases
Solution Approach 1:
The patent extracts the white light generation from complex multi-laser coupling processes, using instead a single blue laser chip with fluorescent powder excitation. This simplified structure is much easier to manufacture in mass production, as it requires fewer alignment steps and less complex packaging assembly.
Solution Approach 2:
The patent uses a standardized blue laser chip design with consistent mounting dimensions and fluorescent powder layer specifications, enabling easy replication and mass production. The uniform structure allows for automated assembly processes and quality control.
3Illumination intensity
If traditional white laser diode packaging is used, then white light is produced, but power consumption is high
Solution Approach 1:
The patent extracts the high power consumption issue from traditional multi-color laser coupling by using a single blue laser chip excitation approach. This reduces the total energy input required while maintaining white light output, as fluorescent conversion is more energy-efficient than generating multiple laser wavelengths separately.
Solution Approach 2:
The patent changes the operational parameters by using blue laser excitation (around 450nm) to trigger fluorescent emission across the visible spectrum. This parameter change in excitation wavelength and mechanism reduces overall power consumption compared to traditional approaches requiring multiple high-power laser sources.
4Ease of manufacture
If a simple packaging structure is used, then manufacturing is easier, but white light production effectiveness decreases
Solution Approach 1:
The patent applies local quality optimization by designing a transparent substrate with specific optical properties in the light path area, while keeping other parts of the packaging simple. The substrate is designed to be transparent to blue laser light while supporting fluorescent powder adhesion, providing localized optical enhancement without increasing overall structural complexity.
Solution Approach 2:
The fluorescent powder acts as an intermediary that efficiently converts blue laser light into white light, ensuring high illumination quality despite the simple packaging structure. The powder layer is optimally positioned and distributed to maximize light conversion efficiency and beam quality.
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
This solution simplifies the manufacturing process, reduces costs, and lowers power consumption while effectively producing a white laser beam, making it more viable for widespread use in products.
Implementation Method 1
the florescent powder thereof generates a physical excitation property to reflect a white laser beam
Data Source
AI summary
An improved cylindrical white laser diode packaging structure in which a blue laser beam is projected by a blue-light laser chip and the blue laser beam with the fluorescent powder of the ceramic fluorescent powder to generate physical excitation characteristics to reflect the white laser beam. Mainly a base with a concave groove in the middle for fixing a ceramic florescent powder, and the base has a seat bar protruding adjacent to the concave groove, and the front of the seat bar is in a vertical plane or an oblique plane for fixing a blue-light laser chip, and a cover body with a light transmissive mouth on the top surface is fixed to the base to form a cylindrical white light laser diode.