LED Package Element with Dual Wavelength-Conversion Layers
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Solution Overview
Problem
Traditional white light LEDs have fixed color temperatures and cannot adjust to achieve desired color temperatures, leading to inhomogeneous light blending and increased design and procurement costs.
Innovation Solution
A light-emitting diode package element featuring a substrate with first and second wavelength-conversion layers, allowing for the production of white light with various color temperatures by combining blue light LEDs with different wavelength-conversion layers to achieve desired color temperatures, while also enabling independent control of luminous intensities and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional white light LED is used, then low power consumption and long life are achieved, but color temperature is fixed and cannot be adjusted to desired values
Solution Approach 1:
The patent divides the light-emitting element into multiple independent LED chips with different color temperatures (e.g., warm white 3000K, natural white 6504K, cold white 9000K) arranged on a common substrate. Each LED chip can be independently controlled, allowing the overall color temperature to be adjusted by varying the driving current ratio between chips, thus achieving color temperature adaptability without replacing the entire light-emitting element.
Solution Approach 2:
The patent makes a single light-emitting element capable of producing multiple color temperatures by integrating multiple LED chips with different color characteristics on one substrate. This multi-functional design allows the same element to serve various lighting scenarios (warm lighting, natural lighting, cool lighting) without requiring separate light-emitting elements for each color temperature requirement.
2Illumination intensity
If traditional white light LED with high color temperature is used, then certain lighting efficiency is achieved, but light blending is inhomogeneous and cannot reach expected color
Solution Approach 1:
The patent implements dynamic control of color temperature by independently adjusting the driving currents of multiple LED chips with different color temperatures. The control circuit can dynamically change the ratio of currents supplied to each chip, enabling continuous adjustment of the overall color temperature and achieving homogeneous light blending by optimizing the contribution of each chip based on desired color targets.
3Adaptability or versatility
If light-emitting element is replaced to achieve expected color temperature, then desired color temperature is obtained, but additional design costs and procurement funds are incurred
Solution Approach 1:
The patent creates a universal light-emitting element platform that can produce multiple color temperatures (3000K, 6504K, 9000K, and intermediate values) using a single substrate design with multiple LED chips. This eliminates the need to procure and design different light-emitting elements for different color temperature requirements, reducing both design complexity and procurement costs while maintaining full color temperature flexibility.
4Adaptability or versatility
If multiple LED chips with different color temperatures are integrated, then color temperature adjustability is achieved, but heat dissipation becomes more complex
Solution Approach 1:
The patent merges multiple LED chips with different color temperatures onto a single substrate with a unified heat dissipation structure. By combining all heat-generating elements on one substrate with shared thermal management features (such as heat sinks or thermal vias), the design simplifies heat dissipation management compared to separate cooling systems for each LED chip, while maintaining full color temperature adjustability through independent electrical control.
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
Enables the production of white light with adjustable color temperatures, improving light homogeneity and extending the lifetime of light-emitting dies through effective heat dissipation and independent control of light-emitting units.
Implementation Method 1
each of the first wavelength-conversion layers is configured to convert into lights with a first color temperature
Implementation Method 2
The second wavelength-conversion layer is configured to convert into light with a second color temperature
Data Source
AI summary
A light-emitting diode package element includes a substrate, a plurality of light-emitting dies arranged on the substrate, and a second wavelength-conversion layer. Some of the light-emitting dies are covered with first wavelength-conversion layers thereon, respectively. The first wavelength-conversion layers convert into light with a first color temperature. The second wavelength-conversion layer covers the substrate, the light-emitting dies, and the first wavelength-conversion layers, and converts into light with second color temperature different to the light with the first color temperature.