Electrode Light-Blocking Layout for Low-Reflection LED Displays
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Solution Overview
Problem
Display devices face challenges in reducing external light reflection from electrodes, which affects light efficiency and visibility, particularly in inorganic light-emitting diode displays.
Innovation Solution
A display device incorporating a light-blocking layer with a light-blocking portion and opening patterns is disposed on the electrodes, absorbing external light and minimizing reflection, while allowing light emission through specific patterns to concentrate light in emission areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light-blocking layer is disposed on the electrodes to prevent external light reflection, then visibility is improved, but light efficiency per unit pixel deteriorates due to light absorption
Solution Approach 1:
The light-blocking layer is selectively disposed only in non-emission areas of the electrode, allowing different regions to have different optical properties. Emission areas maintain high light transmission while non-emission areas block external light reflection, resolving the contradiction between visibility improvement and light efficiency preservation
Solution Approach 2:
The electrode surface is divided into emission areas and non-emission areas, with the light-blocking layer applied only to non-emission areas. This segmentation allows the system to simultaneously achieve reduced external light reflection and maintained light efficiency in emission regions
2Object-affected harmful factors
If a light-blocking layer covers the entire electrode to maximize reflection prevention, then visibility is significantly improved, but light emission intensity deteriorates
Solution Approach 1:
The light-blocking layer is selectively applied only to non-emission areas rather than covering the entire electrode. This local application ensures that emission areas remain fully transparent for light output while non-emission areas provide reflection prevention, resolving the contradiction between visibility improvement and light emission intensity maintenance
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 external light reflection, enhancing light efficiency per unit pixel and improving the visibility of emitted light by concentrating light in emission areas.
Implementation Method 1
The light-blocking layer may include a light-blocking portion absorbing light
Data Source
AI summary
A display device includes a first electrode and a second electrode that are spaced apart from and facing each other; a light-blocking layer disposed above the first electrode and the second electrode; and at least one light-emitting element disposed between the first electrode and the second electrode. The light-blocking layer includes a light-blocking portion absorbing light and an opening pattern. The light-blocking portion includes an area partially overlapping the first electrode and the second electrode. The at least one opening pattern exposes portions of the first and second electrodes facing each other and at least a portion of an area between the first and second electrodes facing each other. The at least one light-emitting element overlaps the at least one opening pattern.