OLED Infrared Emission Layer and Auxiliary Material Integration
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Solution Overview
Problem
Current light emitting display devices face challenges in optimizing infrared ray emission efficiency and luminous intensity, particularly in red, green, and blue pixels, which affects their performance as sensors and display devices.
Innovation Solution
The integration of an infrared ray emission layer and auxiliary layers with specific dopants and materials, such as metal complex compounds, in a light emitting display device structure, allowing for efficient infrared ray emission between pixels and improving luminous intensity and driving voltage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an infrared ray emission layer is added to improve infrared emission efficiency, then sensor application capability is enhanced, but device structure complexity increases
Solution Approach 1:
The patent combines the infrared emission function with the existing display pixel structure by integrating an infrared emission layer into the organic light-emitting diode (OLED) device. This merging approach allows the same device to perform both display and sensor functions, enhancing versatility without requiring a completely separate sensor system.
Solution Approach 2:
The OLED device is designed to serve multiple functions: it acts as both a display device showing visible light images and a sensor detecting infrared radiation. The infrared emission layer enables the device to detect infrared signals from external sources such as fingerprint sensors, while the existing layers continue to provide display functionality, achieving multi-functionality in a single device.
2Use of energy by moving object
If driving voltage is reduced to improve power consumption, then energy efficiency is enhanced, but luminous intensity may be affected
Solution Approach 1:
The patent employs parameter changes in the form of doping the auxiliary layer with specific materials (such as metal complexes or compounds with appropriate energy levels) to optimize the energy transfer efficiency. By adjusting the dopant concentration and selecting materials with suitable HOMO levels, the device achieves improved power efficiency while maintaining adequate luminous intensity through enhanced exciton management and energy utilization.
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 infrared ray emission efficiency, reduces driving voltage, and improves luminous intensity, simplifying manufacturing and expanding sensor applications like fingerprint identification.
Implementation Method 1
A light emitting element may be an element that emits light when an exciton formed by coupling electrons, injected from an anode, and holes, injected from a cathode, with each other in an organic emission layer is stabilized
Implementation Method 2
In the infrared ray emission layer and the first auxiliary layer, an infrared ray emission dopant may be doped to a first pixel emission material or a resonance auxiliary layer material
Data Source
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AI summary
A light emitting display device includes a substrate that includes a first pixel, a second pixel, a third pixel, and an infrared ray emission portion, the first pixel, the second pixel, and the third pixel representing different colors, a first electrode on the substrate, a second electrode that overlaps the first electrode, an emission layer between the first electrode and the second electrode, and an auxiliary layer between the first electrode and the emission layer. The emission layer includes a first emission layer in the first pixel and an infrared ray emission layer in the infrared ray emission portion, the auxiliary layer includes a first auxiliary layer in the first pixel, and the infrared ray emission layer and the first auxiliary layer include the same material.