Multi-Layered Partition Wall Structure for Display Devices
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Solution Overview
Problem
In display devices with micro or nano scale light emitting elements, the narrow distance between partition walls increases the risk of leakage current, affecting light emission efficiency.
Innovation Solution
A display device design featuring a multi-layered partition wall structure with a Transparent Conductive Oxide (TCO) material in the third layer, a reflective metal material in the second layer, and a TCO material in the first layer, along with an insulating layer covering the side surfaces but not the top surface of the third layer, to enhance light emission efficiency and reduce leakage current risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the distance between partition walls is narrowed to micro or nano scale size, then light emission efficiency is improved, but the risk of leakage current between partition walls increases
Solution Approach 1:
The partition wall is constructed as a composite structure with three distinct layers: a first TCO layer (30-100 Å), a second reflective metal layer (4000-10000 Å), and a third TCO layer (500-2000 Å). This composite structure allows the partition wall to maintain electrical insulation while enabling light reflection and transmission, thereby achieving both high light emission efficiency and reliable prevention of leakage current at micro or nano scale distances.
Solution Approach 2:
The partition wall insulating layer extends in the vertical dimension (thickness direction) to cover the side surfaces of the partition wall, providing insulation from a different spatial perspective. This dimensional approach allows the partition wall to maintain narrow horizontal spacing for light emission efficiency while providing sufficient vertical insulation to prevent leakage current.
2Reliability
If the partition wall insulating layer covers the top surface of the light emitting portion, then insulation is improved, but light emission efficiency decreases
Solution Approach 1:
The partition wall insulating layer is selectively positioned to cover only the side surfaces of the partition wall while deliberately excluding the top surface of the light emitting portion. This local differentiation allows the insulating layer to provide electrical insulation where needed (side surfaces) while maintaining optical transparency and light emission efficiency at the light emitting interface (top surface).
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
The solution improves light emission efficiency and reduces the risk of leakage current between partition walls, even at micro or nano scale distances, by optimizing the material composition and structure of the partition walls.
Implementation Method 1
the third partition wall layer includes a Transparent Conductive Oxide (TCO) material
Implementation Method 2
the second partition wall layer includes a reflective metal material
Data Source
AI summary
A display device may include a light emitting portion disposed on a base layer; a partition wall disposed adjacent to the light emitting portion; and a partition wall insulating layer covering at least a portion of the partition wall. The partition wall may include a first partition wall layer; a second partition wall layer disposed on the first partition wall layer; and a third partition wall layer disposed on the second partition wall layer. The third partition wall layer may include a Transparent Conductive Oxide (TCO) material, and the partition wall insulating layer may not cover a top surface of the light emitting portion.