OLED Display Antireflective Transmitting Layer
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Solution Overview
Problem
Organic light emitting diode (OLED) displays face challenges in displaying black color and maintaining contrast due to light reflection from external sources, which degrades visual perception.
Innovation Solution
The OLED display incorporates a substrate with pixel electrodes, an organic emission layer, a transmitting layer with antireflective properties, and a second common electrode connected through common contact holes, using translucent materials like magnesium, silver, or aluminum to minimize internal reflection and improve visual perception by suppressing external light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional OLED display structure is used, then the display is simple in structure, but light reflection from external sources degrades visual perception and contrast
Solution Approach 1:
A transmitting layer with antireflective properties is introduced as an intermediary component between the first common electrode and the second common electrode. This transmitting layer specifically targets and reduces external light reflection while maintaining the overall OLED structure and functionality.
Solution Approach 2:
The display employs composite material structure combining translucent electrode materials (such as magnesium, silver, calcium, lithium, chromium, or aluminum) with a transmitting layer having antireflective properties. This composite approach achieves both electrical conductivity and optical performance improvements.
2Object-affected harmful factors
If translucent electrode materials are used, then light reflection is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The transmitting layer's thickness and refractive index are precisely controlled as key parameters to achieve optimal antireflective performance. By adjusting these parameters, the display minimizes internal reflection of emitted light while maintaining manufacturability.
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 light reflection, enhancing visual perception and contrast by ensuring that light emitted from the organic emission layer is not substantially internally reflected, thereby improving the display's ability to show black colors and maintain image quality.
Implementation Method 1
a transmitting layer formed on the first common electrode and configured to be substantially antireflective
Implementation Method 2
The light is emitted when an exciton created by combination of an electron and a hole in the organic emission layer drops from an exited state to a ground state
Implementation Method 3
At least one of the first common electrode and the second common electrode may be formed of a translucent layer
Data Source
AI summary
An organic light emitting diode display includes a substrate member, a plurality of pixel electrodes formed on the substrate member, an organic emission layer formed on the pixel electrodes, and a first common electrode formed on the organic emission. A transmitting layer may be formed on the first common electrode and is configured to be substantially antireflective. A second common electrode may be formed on the transmitting layer and the first common electrode is electrically connected with the second common electrode.