Stacked Blue OLED Substrate for Brightness and Energy Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic light-emitting diode (OLED) display substrates face issues with low light-emitting efficiency and high energy consumption due to limitations in blue light-emitting layers, leading to short service life and increased energy usage.
Innovation Solution
The OLED display substrate incorporates a stacked structure for the blue light-emitting layer, comprising multiple carrier generation and blue light-emitting layers, along with specific functional layers and filters, to enhance light-emitting efficiency and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the current in blue pixels is increased to ensure sufficient brightness after filtering, then brightness is improved, but energy consumption increases and service life decreases
Solution Approach 1:
The blue light-emitting layer is segmented into multiple sub-layers (first blue light-emitting layer and second blue light-emitting layer) with different light-emitting materials. This segmentation allows each sub-layer to emit light at different wavelengths within the blue spectrum, and when combined with the color filter, achieves sufficient brightness without requiring excessive current, thereby reducing energy consumption.
Solution Approach 2:
The patent uses composite light-emitting materials in the blue light-emitting layers, combining different organic compounds (such as BCP, Bpy-OXD, Bpy-TAZ, Bpy-TRZ) that have different photoluminescence characteristics. This composite approach enables broader spectral coverage and higher overall light-emitting efficiency, allowing the display to achieve required brightness levels with lower energy input.
2Illumination intensity
If the current in blue pixels is increased to ensure sufficient brightness after filtering, then brightness is improved, but service life decreases
Solution Approach 1:
By dividing the blue light-emitting layer into multiple sub-layers with different light-emitting materials, the patent distributes the electrical stress and energy input across multiple materials and interfaces. This segmentation reduces the degradation rate of any single material, thereby extending the overall service life of the blue pixel while maintaining sufficient brightness output.
Solution Approach 2:
The use of composite light-emitting materials with different chemical structures and stability characteristics creates a more robust system. When one material begins to degrade, the others continue to function, providing a buffer that extends the operational lifetime of the blue pixel while maintaining acceptable brightness levels.
3Reliability
If a color filter is added to improve color gamut, then color quality is improved, but light-emitting efficiency decreases
Solution Approach 1:
The patent applies local quality by using different light-emitting materials in different regions (sub-layers) of the blue light-emitting layer. Each material is selected to emit at specific wavelengths that, when filtered by the color filter, maximize the utilization of transmitted light. This localized optimization of emission spectra ensures that the color filter can achieve excellent color gamut while minimizing light loss, thereby maintaining high light-emitting efficiency.
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 results in improved light-emitting efficiency, reducing energy consumption and extending the service life of blue pixels while maintaining color gamut and brightness.
Implementation Method 1
a first carrier generation layer, a first blue light-emitting layer, a second carrier generation layer, a second blue light-emitting layer
Implementation Method 2
first blue light-emitting layer, second blue light-emitting layer
Implementation Method 3
comprises a first color filter for a first color light filtering through
Data Source
AI summary
This disclosure provides an organic light-emitting diode display substrate, and a display apparatus and a production method thereof. The organic light-emitting diode display substrate of this disclosure comprises a blue pixel and a first color pixel, wherein first color light-emitting unit is provided in the first color pixel, and the first color light-emitting unit sequentially comprises a first electrode, a first functional layer, a first color light-emitting layer, a first carrier generation layer, a first blue light-emitting layer, a second carrier generation layer, a second blue light-emitting layer, a second functional layer, and a second electrode in a first direction, and comprises a first color filter; and a blue light-emitting unit is provided in the blue pixel, and the blue light-emitting unit sequentially comprises the first electrode, the first functional layer, the first carrier generation layer, the first blue light-emitting layer, the second carrier generation layer, the second blue light-emitting layer, the second functional layer, and the second electrode in the first direction.