LED Package Resin Cavity Light Diffusion
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Solution Overview
Problem
Existing light emitting devices suffer from light loss and inadequate color rendition and light-diffusing characteristics, limiting their effectiveness as alternatives to traditional light sources.
Innovation Solution
A light emitting device package structure featuring first and second cavities with resin materials, including light diffusing materials, that diffuse light emitted from the devices and excite phosphors to enhance light extraction efficiency and color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If light emitting devices are used to replace traditional light sources, then power consumption is reduced and lifespan is extended, but light loss increases and color rendition is inadequate
Solution Approach 1:
The patent introduces a resin material as an intermediary substance between the light emitting devices and the external environment. This resin material contains phosphors that convert the light from the LEDs, transforming the light spectrum to improve color rendition while maintaining the energy efficiency benefits of LED technology. The resin acts as a mediator that optimizes the light output without adding significant energy consumption.
Solution Approach 2:
The patent modifies the optical parameters of the light emission by incorporating phosphors within the resin material. These phosphors change the wavelength distribution and intensity characteristics of the emitted light, converting high-energy blue or UV light into visible spectrum light with better color rendering properties. This parameter transformation reduces perceived light loss by converting energy into more useful visible wavelengths.
2Use of energy by moving object
If light emitting devices are used to replace traditional light sources, then power consumption is reduced and lifespan is extended, but color rendition and light-diffusing characteristics are inadequate
Solution Approach 1:
The patent employs a composite material system consisting of resin and phosphor particles. The resin provides the structural matrix and optical transparency, while the phosphor particles provide the color conversion function. This composite structure enables simultaneous achievement of low power consumption (inherent LED advantage) and improved color rendition (achieved through phosphor conversion), as the two materials work synergistically to transform the light spectrum while maintaining energy efficiency.
Solution Approach 2:
The resin material serves as an intermediary medium that facilitates color conversion. It contains suspended phosphor particles that absorb high-energy light from the LEDs and re-emit it at lower energies corresponding to visible colors. This intermediary process transforms the poor color rendition of raw LED light into full-spectrum light with excellent color rendering, while the resin itself remains transparent to allow efficient light transmission.
3Productivity
If resin material with phosphors is used to improve color rendition, then light extraction efficiency is enhanced, but device structure becomes more complex
Solution Approach 1:
The patent merges multiple functions into a single integrated resin material component. The resin simultaneously provides structural encapsulation, optical transmission, phosphor carrier, and color conversion functions. By combining these functions that would traditionally require separate components (encapsulant, phosphor layer, optical elements) into one unified resin matrix, the design achieves high light extraction efficiency while minimizing structural complexity. The phosphors are distributed throughout the resin rather than requiring a separate layer.
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
The solution reduces light loss and improves light extraction efficiency, enabling better color rendition and illumination characteristics, particularly in the production of white light by effectively mixing red, green, and blue light beams.
Implementation Method 1
light emitted from the light emitting devices may be diffused by the light diffusing materials formed on the light emitting devices
Implementation Method 2
the phosphors may be excited by the diffused light to emit light
Data Source
AI summary
A light emitting device package is provided that comprises first and second light emitting devices including light emitting diodes, a body a body having a first cavity in which the first light emitting device is positioned and a second cavity in which the second light emitting device is positioned and a resin material formed in the cavity, wherein the resin material includes, a first resin material formed in the first cavity, a second resin material formed in the second cavity, and a third resin material formed an upper surface of the first and second resin materials, wherein at least one of the first resin material and the second resin material includes a light diffusing material.