Organic Light-Emitting Structure With Four Wavelength Units
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional AMOLED display devices have limited color gamut and poor color saturation due to their reliance on RGB primary colors, which restricts their ability to meet the color reproducibility demands of modern display devices.
Innovation Solution
An organic light-emitting structure comprising four light-emitting units with progressively increasing emission wavelengths, including blue, green, yellow, and red, each with enhanced luminous efficiency, to expand the color gamut and improve color richness and saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional RGB three primary colors are used for light emission, then the device structure remains simple, but the color gamut range is limited and color saturation is poor
Solution Approach 1:
The patent divides the traditional RGB three-color system into four separate light-emitting units (red, green, blue, and yellow), with each unit having its own electrode and organic laminated body. This segmentation allows independent optimization of each color channel, enabling broader color gamut while maintaining manageable structural complexity through modular design
Solution Approach 2:
The patent employs composite organic laminated bodies in each light-emitting unit, consisting of multiple functional layers including hole injection layers, hole transport layers, light-emitting layers, electron transport layers, and electron injection layers. These composite material structures enable precise control over charge injection, transport, and recombination processes, achieving enhanced color saturation and gamut
2Ease of manufacture
If traditional RGB three primary colors are used for light emission, then the manufacturing process remains straightforward, but color reproducibility demands are not met
Solution Approach 1:
The patent implements local quality optimization by designing specific organic laminated bodies for each light-emitting unit with tailored material compositions and layer structures. Each unit's organic layers are optimized for its specific color emission requirements, enabling precise control over emission wavelengths and color characteristics, thereby achieving high color reproducibility
Solution Approach 2:
The patent utilizes parameter changes in the organic laminated bodies, including adjusting material compositions, layer thicknesses, and molecular structures, to precisely control the emission properties of each light-emitting unit. By optimizing parameters such as HOMO/LUMO energy levels and charge mobility, the patent achieves accurate color reproduction while maintaining manufacturing feasibility
3Quantity of substance
If four light-emitting units with different emission wavelengths are used, then color gamut and color saturation are improved, but the device complexity increases
Solution Approach 1:
The patent merges the four light-emitting units (red, green, blue, and yellow) into a single integrated display device structure, sharing common elements such as the substrate, encapsulation layers, and driving circuitry. This combining approach enables broad color gamut while controlling overall device complexity through shared components and integrated fabrication processes
Solution Approach 2:
The patent implements multi-functionality by designing the organic laminated bodies to perform multiple functions within each light-emitting unit: charge injection, charge transport, exciton management, and light emission. This multi-functional design reduces the need for separate dedicated layers for each function, thereby controlling device structural complexity while achieving superior color performance
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 proposed structure significantly enhances color reproducibility and image quality by utilizing a combination of blue, green, yellow, and red light-emitting units, offering improved luminous efficiency and color purity, thereby meeting the demands of modern display devices.
Implementation Method 1
each of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit comprises a first electrode, a second electrode, and an organic laminated body placed between the first electrode and the second electrode
Data Source
AI summary
An organic light-emitting structure is described herein. The organic light emitting structure includes a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a fourth light-emitting unit. An emission wavelength of the first light-emitting unit, an emission wavelength of the second light-emitting unit, an emission wavelength of the third light-emitting unit, and an emission wavelength of the fourth light-emitting unit successively increase. Each of a luminous efficiency of the second light-emitting unit, and a luminous efficiency of the third light-emitting unit is greater than each of a luminous efficiency of the first light-emitting unit and a luminous efficiency of the fourth light-emitting unit. The color gamut range of the organic light-emitting structure is increased, the color saturation of the light-emitting device is improved, and quantity of colors is increased, so that the development trend of color reproducibility for the display devices can be satisfied.