Tapered Light Emitting Element Structure to Reduce Light Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face inefficiencies in light emission due to the design of light emitting elements, which often result in loss of light generated, leading to reduced light emission efficiency.
Innovation Solution
The light emitting element is designed with a first semiconductor layer having different widths and a truncated cone shape, along with a reflective layer and insulative film, to guide light emission efficiently, with the reflective layer surrounding the semiconductor, active, and electrode layers, and the insulative film minimizing surface defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional light emitting element design is used, then the structure is simple, but light emission efficiency is reduced due to light loss
Solution Approach 1:
The first semiconductor layer is divided into three distinct parts (first part, second part, and third part) with different width characteristics. This segmentation allows each part to serve specific functions: the first part provides a broader base, the second part aligns with the active layer, and the third part with its increasing width creates light reflection effects to reduce light loss.
Solution Approach 2:
The light emitting element employs asymmetric width design where the first part and second part have different widths, and the third part has varying width at different length positions. This asymmetry creates angled side surfaces that reflect light inward, preventing light leakage and improving emission efficiency without requiring complex additional components.
2Loss of energy
If the first semiconductor layer has uniform width, then manufacturing is easier, but light emission efficiency is reduced
Solution Approach 1:
Different parts of the first semiconductor layer are designed with different width characteristics tailored to their specific functions. The third part specifically has width that increases at different length positions, creating local light reflection zones. This local quality variation optimizes light emission at critical areas without requiring precision across the entire structure.
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 design enhances light emission efficiency by reflecting light inward and minimizing leakage, resulting in improved light transmission and reduced loss, thereby increasing the overall efficiency of the light emitting element.
Implementation Method 1
the reflective layer may include a reflective metal material... This design enhances light emission efficiency by reflecting light inward and minimizing leakage
Data Source
AI summary
A light emitting element includes a first end surface and a second end surface opposite to each other, the light emitting element includes: a first semiconductor layer disposed at the first end surface; an active layer disposed on the first semiconductor layer; a second semiconductor layer disposed on the active layer; and an electrode layer disposed on the second semiconductor layer and disposed at the second end surface. The first semiconductor layer includes a first part, a second part disposed on the first part and adjacent to the active layer, and a third part disposed between the first part and the second part. A width of the first part and a width of the second part are different from each other, and the third part has different widths at different length positions.