W-Shaped Package Compound for LED Light Efficiency
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Solution Overview
Problem
Conventional package structures face inefficiencies in light emission due to scattering and reflection of light within the package compound, leading to reduced lighting performance.
Innovation Solution
A package structure design featuring a substrate, electrodes, a lighting unit, and a package compound with a W-shaped cross section, where the package compound has a concave top surface with an annular slot, allowing light to exit without scattering or reflection, and is embedded with the lighting unit to enhance light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional package compound is used to fill the accommodating space, then the lighting unit is protected and electrically connected, but light scattering and reflection occur inside the package compound reducing lighting efficiency
Solution Approach 1:
The package compound is designed with a W-shaped cross-section featuring concave top surfaces with specific curvature radii (R1, R2, R3) that are optimized to match the wavelength of emitted light. This curvature design enables light to pass through the package compound with minimal scattering and reflection, directly improving lighting efficiency while reducing energy loss.
2Reliability
If the package compound completely fills the accommodating space, then mechanical support and protection are provided, but light spots are generated and lighting performance is reduced
Solution Approach 1:
The package compound is segmented into distinct regions with different functions: the W-shaped cross-section creates specific void spaces that prevent light spots while maintaining mechanical support. The segmentation allows light to pass through designated paths without being scattered, thus preserving both structural reliability and lighting performance.
3Illumination intensity
If scattering or reflecting particles are added to the package compound, then light distribution is improved, but light scattering and reflection increase reducing lighting efficiency
Solution Approach 1:
The package compound is designed with locally optimized properties: the W-shaped cross-section with specific curvature radii creates regions that guide light efficiently, while avoiding the addition of scattering or reflecting particles. This local quality optimization ensures light passes through with minimal energy loss while achieving uniform light distribution.
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 design increases lighting efficiency by 26% compared to conventional structures, preventing light spots and ensuring the reliability of the package structure by managing internal air pressure.
Implementation Method 1
The center of curvature of the concave top surface is located outside of the accommodating space such that light emitted from the concave top surface is gathered outside of the wall
Data Source
AI summary
A package structure is provided. The package structure includes a substrate, a pair of electrodes, a lighting unit, a wall, and a package compound. The pair of electrodes and the wall are disposed on the substrate, and the wall and the substrate jointly define an accommodating space. The lighting unit is disposed in the accommodating space. The package compound is disposed in the accommodating space such that a top end of the package compound has a W-shaped cross section and the lighting unit is embedded in the package compound.