Multiple-Junction LED Lumiphoric Material Arrangements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light-emitting diodes (LEDs) face challenges in producing high-quality light with desired emission characteristics and high efficiency due to light loss and non-uniformity issues associated with lumiphoric material arrangements in LED packages.
Innovation Solution
The implementation of multiple-junction LEDs with individually registered lumiphoric material regions on the chip or package level, allowing for different wavelengths and customizable color options by configuring lumiphoric material regions to respond to light emitted by junctions, and the use of light-altering materials to optimize light direction and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lumiphoric materials are arranged in LED packages to convert light wavelengths, then emission color variety is improved, but light loss and non-uniformity increase
Solution Approach 1:
The patent divides the LED structure into multiple independent junctions, with each junction having its own dedicated lumiphoric material region. This segmentation allows each junction-material pair to operate independently, converting light efficiently without interference from other regions, thus reducing overall light loss while maintaining color variety.
Solution Approach 2:
The patent assigns different lumiphoric materials to different spatial locations on the LED chip, with each location optimized for specific wavelength conversion. This local quality approach ensures that each region converts light optimally for its intended purpose, minimizing energy loss while achieving diverse emission colors across the device.
2Adaptability or versatility
If lumiphoric materials are arranged in LED packages to convert light wavelengths, then emission color variety is improved, but light emission uniformity deteriorates
Solution Approach 1:
By segmenting the LED into multiple independent junctions with dedicated lumiphoric material regions, the patent ensures uniform light emission from each segment. The registered alignment between junctions and material regions guarantees consistent optical paths, maintaining overall emission uniformity while enabling color variety through the use of different materials in different segments.
Solution Approach 2:
The patent uses multiple copies of the junction-lumiphoric material region pair, with each copy registered in specific positions. This replication strategy ensures that each region contributes uniformly to the overall emission, maintaining consistency across the device while achieving color diversity through material variation.
3Adaptability or versatility
If multiple lumiphoric material regions are configured for different wavelengths, then emission color variety is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple junctions and their corresponding lumiphoric material regions into a single integrated LED chip structure. This merging approach allows the device to provide multiple emission colors simultaneously while maintaining a compact, unified form factor, avoiding the complexity of multiple separate LED devices.
Solution Approach 2:
The LED chip is designed with multi-functionality, where a single device structure supports multiple wavelength conversions through different lumiphoric materials. This universal design enables one chip to replace what would traditionally require multiple separate LEDs, reducing overall system complexity while maintaining color variety.
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 approach enables a single multiple-junction LED chip to provide a plurality of different emission colors and wavelengths, enhancing light emission efficiency and uniformity while reducing light loss, making it suitable for various applications including entertainment and architectural lighting.
Implementation Method 1
Lumiphoric materials, such as phosphors, may be arranged in light emission paths of LED emitters to convert portions of light to different wavelengths
Data Source
AI summary
Multiple-junction light-emitting diodes (LEDs), and more particularly lumiphoric material arrangements for multiple-junction LEDs are disclosed. LEDs may refer to multiple-junction LED chips and/or LED packages that include multiple-junction LED chips. Individual lumiphoric material regions may be arranged in positions that are registered with individual junctions of a multiple-junction LED chip. The lumiphoric material regions may be formed at the LED chip level and/or at the LED package level. Different ones of the lumiphoric material regions may be configured to provide different wavelengths in response to recipient light emitted by junctions of the LED chip. In this manner, a single multiple-junction LED chip according to the present disclosure may be capable of providing a plurality of different emission colors and/or wavelengths.