Light-Blocking Insulating Layer for Low-Reflectance Displays
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Solution Overview
Problem
Display devices face challenges in reducing reflectance, which affects display quality due to high reflectivity of electrodes, especially when external light is reflected by these electrodes.
Innovation Solution
Incorporating a first insulating layer with a light-blocking material, such as carbon black, between the electrodes and the light-emitting elements, and a light-blocking layer above this insulating layer to cover the electrodes, thereby reducing external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-blocking layer is added to reduce reflectance, then display quality is improved, but device complexity increases
Solution Approach 1:
The light-blocking material is integrated within the first insulating layer, which itself is part of the existing electrode structure. This nesting approach allows the light-blocking function to be incorporated without adding a separate external layer, thereby reducing the increase in device complexity while still achieving the goal of reducing reflectance
Solution Approach 2:
The patent combines the light-blocking function with the insulating layer by dispersing light-blocking material within the insulating material. This merging of functions allows a single layer to serve both as an insulator and as a light-blocking layer, reducing the total number of layers needed and simplifying the overall device structure
2Object-affected harmful factors
If light-blocking material is scattered in the first insulating layer, then external light reflection is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The first insulating layer contains scattered light-blocking material particles distributed throughout its volume, creating a composite structure with dispersed phases. This approach allows light blocking without requiring precise positioning, as the scattered particles collectively achieve the light-blocking effect while maintaining ease of manufacturing
Solution Approach 2:
The patent uses a composite material consisting of an insulating matrix with light-blocking particles scattered throughout. This composite structure combines the insulating properties of the base material with the light-blocking properties of the dispersed particles, achieving both electrical insulation and optical protection without complex manufacturing processes
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 effectively reduces reflectance, enhancing display quality by minimizing external light reflection and improving the visibility of the display device.
Implementation Method 1
a first insulating layer between the light-emitting element and the first and second electrodes, and including a light-blocking material
Data Source
AI summary
A display device is provided. The display device comprises a substrate, a first electrode and a second electrode above the substrate, extending in one direction, and spaced apart from each other in another direction, a light-emitting element above the first electrode and the second electrode, a first connection electrode contacting one end portion of the light-emitting element, a second connection electrode contacting another end portion of the light-emitting element, and a first insulating layer between the light-emitting element and the first and second electrodes, and including a light-blocking material.