OLED Pixel Layout and Sensing Electrode Structure for Longer Lifespan
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Solution Overview
Problem
Existing organic light-emitting electronic devices face challenges in extending the lifespan of pixels due to issues with current density and aperture ratio, leading to reduced reliability.
Innovation Solution
The electronic device incorporates a display layer with specific pixel arrangements and a sensing electrode structure featuring mesh lines and protruding parts to optimize pixel spacing and reduce current density, enhancing the aperture ratio and extending pixel lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If pixels are arranged with smaller spacing to increase display density, then the aperture ratio decreases and current density increases, but the pixel lifespan is reduced
Solution Approach 1:
The patent applies local quality by differentiating the spacing between pixels based on their position and function. Specifically, the spacing between sub-pixels of different colors is optimized locally to balance current density and aperture ratio, rather than using uniform spacing throughout the display. This localized optimization allows smaller pixel areas while maintaining reliability.
Solution Approach 2:
The patent changes the geometric parameters of pixel arrangement, specifically the spacing distances between sub-pixels. By optimizing the first distance between sub-pixels and the second distance between adjacent pixel groups, the patent achieves a balance between aperture ratio and current density that extends pixel lifespan while maintaining display density.
2Illumination intensity
If current density is increased to improve display brightness, then the pixel lifespan is reduced
Solution Approach 1:
The patent optimizes the geometric parameters of pixel spacing to achieve an optimal balance between aperture ratio and current density. By carefully selecting the first distance between sub-pixels and the second distance between adjacent pixel groups, the patent enables sufficient brightness while maintaining lower current density to extend pixel lifespan.
3Productivity
If aperture ratio is increased to improve light emission efficiency, then the pixel area must be larger, but this reduces display density
Solution Approach 1:
The patent applies local quality by optimizing the aperture ratio locally within each pixel group. By differentiating the spacing between sub-pixels of different colors and optimizing the second distance between adjacent pixel groups, the patent achieves high light emission efficiency without requiring larger pixel areas, thus maintaining display density.
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 optimized pixel arrangement improves the lifespan and reliability of the electronic device by reducing current density and increasing the aperture ratio, resulting in improved performance and longevity.
Implementation Method 1
the sensor layer may include a plurality of first sensing electrodes and a plurality of second sensing electrodes, the plurality of first sensing electrodes and the plurality of second sensing electrodes forming a plurality of electrode pairs, respectively, with different capacitances
Implementation Method 2
An electron injected from one electrode, and a hole injected from the other electrode, combine in the light-emitting layer to form an exciton, and light is emitted when the exciton releases energy
Data Source
AI summary
Provided is an electronic device including a display layer having pixels, and a sensor layer having a sensing electrode, wherein the pixels may include a first pixel group and a second pixel group, the first pixel group may include a (1-1)-th sub pixel, a (1-2)-th sub pixel spaced apart from the (1-1)-th sub pixel at a first distance, and a (1-3)-th sub pixel, the second pixel group may include a (2-1)-th sub pixel, a (2-2)-th sub pixel spaced apart from the (2-1)-th sub pixel at the first distance, and a (2-3)-th sub pixel, the (1-1)-th sub pixel and the (2-2)-th sub pixel may be adjacent to each other, and may be spaced apart from each other at a second distance different from the first distance.