LED Package Reflecting Cup Light Extraction
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Solution Overview
Problem
Conventional LED packages face challenges in enhancing light extraction efficiency and thermal management due to the lack of effective integration of a reflecting cup structure, which affects the overall performance and reliability of illumination devices.
Innovation Solution
The proposed LED package incorporates a reflecting cup extending from the base, surrounding the LED die and electrodes, with a supporting portion inside the cup to enhance structural strength and light reflection, while the encapsulation covers the LED die and electrodes, potentially including phosphor powders for enhanced light diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reflecting cup structure is integrated into the LED package, then light extraction efficiency is improved, but device complexity increases
Solution Approach 1:
The reflecting cup is integrated directly into the LED package structure, merging the light reflection function with the package housing. This eliminates the need for separate external reflectors and reduces overall device complexity while improving light extraction efficiency.
Solution Approach 2:
The reflecting cup structure serves multiple functions: it reflects light to improve extraction efficiency, provides structural support for the LED die, and aids in thermal management. This multi-functionality reduces the need for additional components.
2Temperature
If a reflecting cup structure is integrated into the LED package, then thermal management is improved, but device complexity increases
Solution Approach 1:
The reflecting cup is combined with the thermal management structure, allowing it to serve both optical reflection and heat dissipation functions. This integration improves thermal management without requiring separate thermal management components.
Solution Approach 2:
The reflecting cup structure performs multiple functions including light reflection, structural support, and thermal management. This multi-functionality approach improves thermal management while avoiding additional components that would increase complexity.
3Strength
If a supporting portion is added inside the reflecting cup, then structural strength is improved, but device complexity increases
Solution Approach 1:
The supporting portion is strategically placed inside the reflecting cup at the specific location where the LED die is mounted. This localized reinforcement provides necessary structural strength without adding complexity to the entire device structure.
Solution Approach 2:
The supporting portion is integrated into the reflecting cup structure, combining the support function with the existing optical component. This eliminates the need for separate support structures and minimizes overall device complexity.
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 configuration improves light extraction efficiency and thermal management, leading to better performance and reliability of the LED package by effectively directing and reflecting light, as well as providing structural support to the reflecting cup.
Implementation Method 1
a reflecting cup extending from the base, surrounding the LED die and electrodes
Implementation Method 2
the encapsulation covers the LED die and electrodes, potentially including phosphor powders for enhanced light diffusion
Data Source
AI summary
The present disclosure provides an LED package which includes electrodes, an LED die electrically connected with the electrodes, an encapsulation covering the LED die; and a casing surrounding the encapsulation and the LED die. The casing includes a base, a reflecting cup and a supporting portion. The reflecting cup extends from the base upwards, the reflecting cup surrounds the LED die, and the supporting portion is located inside the reflecting cup and across the electrodes.