White Light-Emitting Device With Barrier Rib Color Conversion
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Solution Overview
Problem
Current organic light-emitting devices for illumination and display applications face challenges in efficiently producing white light with low power consumption and high luminescent efficiency, often requiring complex structures with separate blue light-emitting diodes and color conversion layers.
Innovation Solution
A white light-emitting device is designed with first and second barrier ribs containing color conversion materials and a third color layer that emits blue light, where the color conversion materials absorb and re-emit light to produce red and green components, combined with blue light to generate white light, using an insulating resin binder and auxiliary electrodes for improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate blue light-emitting diodes and color conversion layers are used, then white light can be produced, but the structure becomes complicated and efficiency is reduced
Solution Approach 1:
The patent combines multiple color conversion materials (first color conversion material in first barrier rib, second color conversion material in second barrier rib, and third color conversion material in third barrier rib) within a single organic light-emitting device structure. This merging approach eliminates the need for separate blue light-emitting diodes and multiple discrete color conversion layers, simplifying the overall structure while maintaining high luminescent efficiency through integrated color conversion.
2Use of energy by moving object
If separate blue light-emitting diodes and color conversion layers are used, then white light can be produced, but power consumption increases
Solution Approach 1:
The patent integrates all color conversion functions within a single organic light-emitting device, combining the light emission and color conversion processes into one unified structure. This eliminates energy losses associated with separate components and interfaces, reducing overall power consumption while improving luminescent efficiency.
Solution Approach 2:
The patent employs multiple color conversion materials with different conversion characteristics (first color conversion material, second color conversion material, and third color conversion material) arranged in barrier ribs. These composite material structures enable efficient wavelength conversion from blue to red, green, and yellow light, optimizing energy utilization and reducing power consumption.
3Loss of energy
If multiple color conversion materials are integrated in barrier ribs, then luminescent efficiency is enhanced, but device complexity increases
Solution Approach 1:
The patent divides the color conversion function into segmented barrier ribs (first barrier rib, second barrier rib, third barrier rib), each containing a specific color conversion material. This segmentation allows for optimized placement and function of each material while maintaining an organized, manageable structure that does not excessively increase device complexity.
Solution Approach 2:
The barrier rib structure serves multiple functions simultaneously: it provides structural support, enables color conversion through integrated materials, and facilitates light extraction. This multi-functionality reduces the need for additional separate components, thereby enhancing luminescent efficiency without proportionally increasing device complexity.
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 simplifies the device structure, enhances luminescent efficiency, and reduces power consumption by integrating color conversion within the device, enabling effective white light emission with reduced manufacturing complexity and cost.
Implementation Method 1
the third color layer B...emits blue light...the first color conversion material...emits red light...the second color conversion material...emits green light
Implementation Method 2
the first color conversion material and the second color conversion material may absorb light emitted from the third color layer and emit light having a different wavelength range
Data Source
AI summary
A white light-emitting device includes a first electrode; a first barrier rib on the first electrode including a first color conversion material; a second barrier rib on the first electrode spaced apart from the first barrier rib and including a second color conversion material; a third color layer between the first barrier rib and the second barrier rib that emits white light when light emitted from the third color layer is combined with light emitted from first color conversion material and light emitted from the second color conversion material; and a second electrode on the first barrier rib, the second barrier rib, and the third color layer.