OLED Display Panel with Integrated Quantum Dot Color Conversion
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Solution Overview
Problem
Current OLED display technologies face challenges in achieving simple manufacturing processes, high color purity, and increased carrier mobility, particularly when using quantum dots as color conversion materials, which require additional masks and complex procedures.
Innovation Solution
Incorporating color conversion units, comprising quantum dots with organic or inorganic shells, uniformly into the electron transporting layer, light-emitting layer, or hole transporting layer of an OLED, allowing for simplified manufacturing and enhanced carrier mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If quantum dots are used as color conversion material in OLED, then color purity and luminous efficiency are improved, but manufacturing complexity increases due to additional masks
Solution Approach 1:
The patent combines the quantum dot color conversion layer with the OLED functional layers (electron transporting layer, hole transporting layer, or light-emitting layer) into a single integrated layer structure. This merging eliminates the need for separate quantum dot layer deposition and additional alignment masks, thereby reducing manufacturing complexity while maintaining high color purity through the quantum dot's narrow emission spectrum
2Power
If quantum dots are used as color conversion material in OLED, then luminous efficiency is improved, but device structure becomes more complex
Solution Approach 1:
The patent integrates quantum dots into the electron transporting layer, hole transporting layer, or light-emitting layer of the OLED, merging multiple functional layers into one. This combined layer simultaneously provides charge transport functionality and color conversion through quantum dots, maintaining high luminous efficiency while simplifying the overall device structure
Solution Approach 2:
The combined layer serves multiple functions: it acts as both a charge transporting layer (electron or hole transporting) and a color conversion layer containing quantum dots. This multi-functionality reduces the number of separate layers needed, simplifying device structure while preserving the high luminous efficiency provided by the quantum dots
3Manufacturing precision
If additional masks are added for quantum dot layer manufacturing, then color purity can be maintained, but manufacturing cost increases
Solution Approach 1:
The patent merges the quantum dot color conversion function with existing OLED layers, eliminating the need for separate quantum dot layer deposition equipment and additional alignment masks. This integration maintains color purity through precise quantum dot placement within the functional layers while significantly reducing manufacturing cost by removing expensive mask-making and alignment processes
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 manufacturing process, improves color purity, and increases carrier mobility, resulting in more efficient and stable OLED displays.
Implementation Method 1
Quantum dots are generally light-emitting particles of nanometer sizes, and emit visible fluorescence after being stimulated by absorbing certain energy
Implementation Method 2
emit visible fluorescence after being stimulated by absorbing certain energy
Implementation Method 3
a color filter 27 is used for filtering out blue light or ultraviolet light emitted from the quantum dot layer 26
Data Source
AI summary
The invention belongs to the field of display technology, and particularly to a display panel and a display device. The display panel includes a driving substrate and an OLED provided on the driving substrate, the OLED includes a first electrode and a second electrode, and further includes an electron transporting layer, a light-emitting layer and a hole transporting layer provided between the first electrode and the second electrode, and a plurality of color conversion units are uniformly distributed in the electron transporting layer, the light-emitting layer or the hole transporting layer. Advantageous effects of the invention are as follows: with the configuration that the color conversion units are directly doped into any one of the hole transporting layer, the light-emitting layer, and the electron transporting layer, structure of display panel and corresponding manufacturing procedure are simplified, and color purity of the display panel and carrier mobility are efficiently increased.