OLED Pixel Unit With Photonic Crystal Array For High Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current OLED panel production processes struggle to achieve high resolution and super high resolution displays, particularly for micro-size OLEDs, due to difficulties in controlling fineness and high production costs associated with small pixel sizes and complex processes.
Innovation Solution
Incorporating a photonic crystal array at the light exit side of the organic light emitting diode, with structural parameters tailored to specific colors, to selectively filter wavelengths and enhance resolution, using methods such as lithographic etching or nanometer imprinting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional OLED production processes (FMM, evaporation, solution printing) are used, then OLED panels can be produced, but fineness control is difficult and manufacturing precision deteriorates for pixel sizes less than 50 μm
Solution Approach 1:
The invention divides the color generation function into two independent parts: (1) the OLED emits broad-spectrum light, and (2) the photonic crystal array selectively transmits specific wavelengths. This segmentation allows each component to be optimized independently, achieving high precision without increasing overall process difficulty.
Solution Approach 2:
The photonic crystal array acts as an intermediary component between the OLED and the viewer. It mediates the broad-spectrum light from the OLED to produce precise colors through wavelength-selective transmission, enabling high manufacturing precision without requiring complex evaporation or printing processes.
2Manufacturing precision
If conventional processes (FMM, evaporation, solution printing) are used to produce color OLED assemblies, then preset colors can be achieved, but production costs increase and device complexity increases
Solution Approach 1:
The photonic crystal array serves multiple functions simultaneously: (1) wavelength selection for color purity, (2) structural color generation, and (3) integration with existing OLED processes. This multi-functionality achieves precise color control without requiring separate complex color generation processes for each pixel type.
Solution Approach 2:
The invention changes the approach to color generation by shifting from material composition control (in FMM/evaporation processes) to structural parameter control (photonic crystal geometry). By adjusting the photonic crystal structure parameters, precise colors can be achieved without complex material deposition processes.
3Measurement precision
If pixel size is reduced to achieve high resolution display, then resolution improves, but manufacturing precision deteriorates due to difficulty in controlling fineness
Solution Approach 1:
The invention transitions from controlling color through lateral material patterns (in-plane dimension) to controlling color through vertical photonic crystal structures (out-of-plane dimension). This dimensional shift enables high resolution display because the photonic crystal arrays can be fabricated with precise vertical control independent of pixel size reduction.
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 approach allows for significant improvement in resolution, simplifies the production process, and reduces the difficulty of achieving high resolution displays, making it compatible with conventional thin film transistor and OLED production processes.
Implementation Method 1
a photonic crystal array located at a light exit side of the organic light emitting diode, structural parameters of the photonic crystal array depending on a preset color of the OLED pixel unit, wherein the light emitted from the organic light emitting diode has a wavelength which is selected by the photonic crystal array such that the preset color is presented at the light exit side of the organic light emitting diode
Data Source
AI summary
The present disclosure provides an OLED pixel unit, a method for producing the same, a display panel and a display apparatus. The OLED pixel unit includes an organic light emitting diode configured to emit a light within a wavelength range; and a photonic crystal array located at a light exit side of the organic light emitting diode, structural parameters of the photonic crystal array depending on a preset color of the OLED pixel unit. The light emitted from the OLED has a wavelength which is selected by the photonic crystal array such that the preset color is presented at the light exit side of the OLED. It can achieve high resolution over the conventional means due to the photonic crystal array having a machining size in nanometers. Thus, the resolution of the OLED pixel unit using the photonic crystal array can be improved significantly.