Lumiphoric Material Regions for LED Packages
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED packages face challenges in producing high-quality light with desired emission characteristics, particularly when combining different emission colors in smaller sizes, due to limitations in light extraction and external quantum efficiency caused by internal reflection and complex lumiphoric material arrangements.
Innovation Solution
The arrangement of lumiphoric material regions and light-altering materials within LED packages, where lumiphoric material regions are positioned close to each other and aligned with peripheral edges of the submount, and light-altering materials form nonintersecting segments to define the boundaries of these regions, enhancing light output and reducing fabrication steps and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LED chips with different emission colors are arranged within a common LED package, then the LED package can provide multiple and selectable illumination characteristics, but the device complexity and difficulty in producing high quality light increase
Solution Approach 1:
The patent divides the LED package into distinct lumiphoric material regions, each associated with a specific LED chip and emitting a particular color. These regions are spatially separated and organized within the package, allowing independent control and optimization of each emission zone while maintaining overall package functionality.
Solution Approach 2:
Different lumiphoric material regions are assigned to different LED chips based on their emission characteristics. Each region has localized properties optimized for its specific LED chip's wavelength and emission pattern, enabling high-quality light production for each color while managing the complexity of multiple colors within a single package.
2Volume of moving object
If lumiphoric material regions are arranged in close proximity to maximize light extraction, then the LED package size can be reduced, but internal reflection and light extraction efficiency are compromised
Solution Approach 1:
Light-altering materials are positioned between adjacent lumiphoric material regions to act as optical intermediaries. These materials modify light propagation, reduce internal reflection, and improve extraction efficiency by controlling the optical environment at the interfaces between closely spaced lumiphoric regions, enabling compact packaging without sacrificing light extraction performance.
3Loss of energy
If conventional lumiphoric material arrangements are used to maintain light extraction efficiency, then the LED package size increases, but the ability to provide multiple illumination characteristics is limited
Solution Approach 1:
The patent optimizes the vertical arrangement and depth positioning of lumiphoric material regions within the package structure. By carefully controlling the vertical alignment and depth of each lumiphoric region relative to the LED chips and light-altering materials, the design achieves efficient light extraction in a compact three-dimensional configuration, maximizing light output while minimizing package volume.
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 configuration results in LED packages with increased light output, reduced size, and simplified manufacturing, enabling multiple and selectable illumination characteristics while maintaining efficient light extraction.
Implementation Method 1
Lumiphoric material regions over corresponding LED chips may be provided with increased sizes relative to overall LED package dimensions
Implementation Method 2
According to the well-understood implications of Snell's law, photons reaching the surface (interface) between an LED surface and the surrounding environment are either refracted or internally reflected
Implementation Method 3
If photons are internally reflected in a repeated manner, then such photons eventually are absorbed and never provide visible light that exits an LED
Data Source
AI summary
Lumiphoric material region arrangements are provided for light-emitting diode (LED) packages. Certain aspects relate to arrangements of light-altering materials and lumiphoric material regions for LED packages. Lumiphoric material regions over corresponding LED chips may include increased sizes relative to overall LED package dimensions. Lumiphoric material regions may be arranged to extend to certain peripheral edges of an LED package. Multiple lumiphoric material regions and corresponding LED chips may be arranged in close proximity to one another to provide LED packages with multiple and selectable illumination characteristics. Light-altering materials may be arranged that at least partially define certain peripheral edges of lumiphoric material regions. The light-altering materials may form one or more nonintersecting segments arranged about the lumiphoric material regions. Certain aspects relate to LED packages having one or more of reduced sizes, increased light output, and reduced fabrication steps.