Light-Emitting Structure With Split Body and Emission Lengths
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Solution Overview
Problem
Existing display devices face challenges in optimizing the structure of light-emitting devices to enhance emission efficiency and directional control of light emission.
Innovation Solution
The proposed light-emitting device includes a body part and a light-emitting part with different lengths, featuring a first and second electrode system with specific patterns and contact electrodes, and a semiconductor layer configuration that allows for varied light emission directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light-emitting part has the same length as the body part, then the structure is simple, but the light emission efficiency and directional control are insufficient
Solution Approach 1:
The light-emitting device is divided into two distinct parts: a body part and a light-emitting part. The light-emitting part has a different length than the body part, creating a segmented structure that optimizes both light emission efficiency and directional control while maintaining manufacturing simplicity
Solution Approach 2:
Different parts of the device are given different lengths to serve different functions. The body part provides structural support while the light-emitting part is optimized for light emission, creating local quality variations that enhance overall performance without complicating the overall structure
2Ease of manufacture
If the light-emitting part has the same length as the body part, then the structure is simple, but the directional control of light emission is insufficient
Solution Approach 1:
The device is segmented into body part and light-emitting part with different lengths, enabling the light-emitting part to be positioned and oriented independently for precise directional control while keeping the overall structure simple and easy to manufacture
Solution Approach 2:
The light-emitting part is designed with asymmetric length compared to the body part, creating an asymmetric structure that provides inherent directional control for light emission while maintaining ease of manufacture through a relatively simple geometric modification
3Volume of moving object
If the active layer has a small area, then the device size is compact, but the light emission efficiency is reduced
Solution Approach 1:
The active layer area is optimized by utilizing the three-dimensional space created by the segmented structure. The light-emitting part extends in a specific direction, allowing the active layer to have sufficient area for efficient light emission while keeping the overall device footprint compact through vertical or lateral dimension optimization
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 enhances light emission efficiency and enables controlled light emission in multiple directions, improving the performance of display devices.
Implementation Method 1
a light-emitting device includes a light-emitting part, a body part having a different width from the light-emitting part, and an active layer having a relatively large area
Data Source
AI summary
A display includes: a first electrode including a first electrode line and a second electrode line; a light-emitting device between the first electrode line and the second electrode line; a first contact electrode including a first pattern overlapping the first electrode line and one end of the light-emitting device and a second pattern overlapping the second electrode line and the other end of the light-emitting device; a second electrode on the light-emitting device and overlapping the first electrode and the light-emitting device; and a second contact electrode between the light-emitting device and the second electrode, wherein a light-emitting device includes a plurality of semiconductor layers and an insulating film partially surrounding the external surfaces of the semiconductor layers, a main body unit, and a light-emitting unit on the main body unit and having a shorter length than the main body unit.