Conversion Element With Oblique Side Surfaces For Light Flux
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Solution Overview
Problem
Existing optoelectronic devices face challenges in maximizing light flux due to the mismatch between the radiation exit surface of semiconductor chips and the light coupling-out surface of conversion elements, leading to inefficient light emission and limited application in devices with predetermined light exit surfaces.
Innovation Solution
The integration of a conversion element with a conversion plate having oblique side surfaces and a transparent element adjacent to these surfaces, which guides electromagnetic radiation from the semiconductor chip's radiation exit surface to a smaller light coupling-out surface, enhancing light flux while maintaining a defined light exit surface size and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light coupling-out surface of the conversion element is made smaller to match predetermined device requirements, then the light flux is reduced, but the device can be integrated into applications with fixed light exit surfaces
Solution Approach 1:
The patent introduces oblique side surfaces on the conversion element that extend in a third dimension, creating a tapered or angled geometry. This dimensional change allows light to be redirected from a larger radiation exit surface to a smaller light coupling-out surface, effectively solving the mismatch problem while maintaining both adaptability and light flux.
Solution Approach 2:
The oblique side surfaces act as an intermediary structure between the radiation exit surface and the light coupling-out surface. These surfaces guide and redirect the electromagnetic radiation, enabling efficient light transfer from the larger semiconductor chip surface to the smaller conversion element output surface.
2Quantity of substance
If the conversion element is designed with oblique side surfaces to guide light, then light flux is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent modifies the geometric parameters of the conversion element by introducing oblique side surfaces with specific angles. This parameter change optimizes light guidance while maintaining a relatively simple overall structure that can be manufactured using conventional techniques.
Solution Approach 2:
The oblique side surfaces create an asymmetric geometry on the conversion element, breaking the symmetry of traditional flat conversion elements. This asymmetry is specifically designed to redirect light efficiently from the radiation exit surface to the smaller light coupling-out surface, improving light flux through directional guidance.
3Adaptability or versatility
If the conversion element size is reduced to fit predetermined light exit surfaces, then adaptability is improved, but the light coupling efficiency decreases
Solution Approach 1:
By adding oblique side surfaces that create a three-dimensional tapered structure, the patent enables effective light coupling from a larger radiation exit surface to a smaller light coupling-out surface. This dimensional approach prevents light loss that would occur with a simple flat reduction in size.
Solution Approach 2:
The oblique side surfaces serve as an intermediary light-guiding structure that bridges the size mismatch between the radiation exit surface and the light coupling-out surface, maintaining high coupling efficiency despite the size reduction necessary for adaptability.
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 increases the light flux of optoelectronic devices by effectively directing radiation from the semiconductor chip to a smaller light coupling-out surface, suitable for applications like headlamps or projectors, where the light exit surface size and shape are predetermined.
Implementation Method 1
the transparent element is formed to guide electromagnetic radiation to a light coupling-out surface of the conversion plate
Implementation Method 2
the transparent element is formed to guide electromagnetic radiation to a light coupling-out surface of the conversion plate
Implementation Method 3
a conversion element converting electromagnetic radiation of a first wavelength range into electromagnetic radiation of a second wavelength range
Data Source
AI summary
The optoelectronic device including a radiation emitting semiconductor chip emitting electromagnetic radiation of a first wavelength range from a radiation exit surface, and a conversion element converting electromagnetic radiation of the first wavelength range into electromagnetic radiation of a second wavelength range at least partially and emitting electromagnetic radiation from a light coupling-out surface, wherein the light coupling-out surface of the conversion element is smaller than the radiation exit surface of the semiconductor chip.