Semiconductor Light Emitting Device Sloped Light Guide
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Solution Overview
Problem
Conventional semiconductor light emitting devices face challenges in achieving miniaturization and higher brightness due to difficulties in applying surface roughening techniques, which are impractical for miniaturized devices.
Innovation Solution
A semiconductor light emitting device with a light extraction surface parallel to the lamination direction, featuring a light guide member with sloped surfaces and a light-reflecting member, along with an insulating package that covers the semiconductor layer and light guide member, is used to reduce light leakage and enhance brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If surface roughening is applied to increase light emission intensity, then brightness is improved, but device miniaturization becomes difficult
Solution Approach 1:
The patent transitions from surface-level light extraction (2D surface roughening) to volumetric light guiding (3D internal structure with sloped surfaces). The light guide member uses internal sloped surfaces to redirect light paths, enabling effective light extraction without increasing device footprint, thus resolving the contradiction between brightness enhancement and miniaturization.
Solution Approach 2:
The light guide member acts as an intermediary between the light emitting element and the external environment. It contains internal sloped surfaces that mediate light propagation, redirecting light at controlled angles to achieve high light extraction efficiency without requiring surface roughening or increasing device size.
2Productivity
If light guide member with sloped surfaces is used to guide light, then light extraction efficiency is improved, but device structure becomes more complex
Solution Approach 1:
The patent combines the light guide function and the light extraction function into a single integrated component. The light guide member simultaneously performs light propagation and light extraction through its sloped surfaces, eliminating the need for separate light extraction structures and reducing overall device complexity while maintaining high extraction efficiency.
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 effectively reduces light loss and increases brightness by efficiently guiding light to the extraction surface, achieving miniaturization and higher emission intensity while inhibiting light leakage.
Implementation Method 1
a light guide member placed on the semiconductor layer and having a first sloped surface that is a side surface opposite to the light extraction surface and sloped to the light extraction surface
Implementation Method 2
a light-reflecting member placed on a surface of the light guide member including at least the first sloped surface of the light guide member
Data Source
AI summary
A semiconductor light emitting device that achieves miniaturization and high brightness is provided. The semiconductor light emitting device has a light extraction surface (6) parallel to a lamination direction of a semiconductor layer (2). The semiconductor light emitting device includes a light guide member (3) placed on the semiconductor layer (2) and having a sloped surface (7) with a side surface opposite to the light extraction surface (6) sloped to the light extraction surface and a light-reflecting member (4) placed on a surface of the light guide member including at least the sloped surface of the light guide member.