Ceramic Wavelength Conversion Segments for LED Color Mixing
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Solution Overview
Problem
The high cost and complexity of using multiple LED chips to produce mixed-color or white light due to the need for individual LED chips with different emission colors, which increases costs and complexity.
Innovation Solution
A wavelength conversion element comprising at least two ceramic conversion segments with a ceramic wavelength conversion substance, connected by a non-transparent material, which absorbs primary radiation and re-emits secondary radiation with minimal primary radiation presence, allowing for efficient color conversion without the need for multiple LED chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LED chips with different emission colors are combined to produce mixed-color or white light, then color variety and light quality are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The single LED chip is divided into multiple functional zones, each containing a different phosphor material that converts the blue light to different colors. This segmentation allows multiple colors to be generated from a single chip structure, eliminating the need to combine multiple separate LED chips while maintaining color variety.
Solution Approach 2:
Multiple phosphor materials with different emission characteristics are combined within a single LED chip package. The blue LED chip serves as a common light source, and different phosphor layers or regions are integrated to produce red, green, yellow, and other wavelengths simultaneously, achieving white light or mixed-color output from one unified device.
2Adaptability or versatility
If multiple LED chips with different emission colors are combined to produce mixed-color or white light, then color variety and light quality are improved, but manufacturing cost increases
Solution Approach 1:
Multiple phosphor materials with different emission characteristics are combined within a single LED chip package. The blue LED chip serves as a common light source, and different phosphor layers or regions are integrated to produce red, green, yellow, and other wavelengths simultaneously, achieving white light or mixed-color output from one unified device.
Solution Approach 2:
A single blue LED chip is designed to perform multiple functions by incorporating different phosphor materials that can be selectively activated or distributed to produce various colors. This multi-functional approach allows one chip to replace what would traditionally require multiple specialized LED chips, reducing component inventory and assembly costs.
3Productivity
If a wavelength conversion element uses ceramic conversion segments with non-transparent connecting material, then color conversion efficiency is improved, but light transmission is reduced
Solution Approach 1:
The wavelength conversion element employs a matrix structure where ceramic conversion segments with high conversion efficiency are arranged in specific patterns and connected by non-transparent material only where necessary for structural integrity and optical isolation. This localized use of non-transparent material minimizes its impact on overall light transmission while maintaining the benefits of ceramic phosphor conversion.
Solution Approach 2:
The wavelength conversion element uses a composite structure combining ceramic conversion segments (providing high color conversion efficiency) with a matrix of non-transparent connecting material (providing structural support and optical isolation). This composite approach allows the system to achieve both high conversion efficiency and acceptable light transmission by optimizing the arrangement and properties of both materials.
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 reduces costs and complexity by enabling effective color conversion with minimal primary radiation presence, allowing for adjustable color emission with a single semiconductor chip, achieving high-resolution displays at lower costs compared to traditional LED-based systems.
Implementation Method 1
each conversion segment emits light by absorbing primary radiation and re-emitting secondary radiation different from the primary radiation
Data Source
AI summary
A wavelength conversion element including at least two ceramic conversion segments each including a ceramic wavelength conversion substance and connected together in a matrix by a non-transparent connecting material, wherein each conversion segment emits light by absorbing primary radiation and re-emitting secondary radiation different from the primary radiation, and the light comprises the secondary radiation and a proportion of the primary radiation is less than or equal to 5%.