OLED Second Electrode Aperture Pattern for Sharper Display Imaging
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Solution Overview
Problem
Organic EL display devices experience light diffraction due to periodic regions without a second electrode, which can reduce image sharpness and affect the performance of optical components.
Innovation Solution
The second electrode is designed with non-overlapping apertures arranged in a specific pattern to minimize regularity, reducing diffracted light intensity and enhancing transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the second electrode is formed with periodic regions (apertures) to enhance light transmittance, then light transmittance is improved, but light diffraction occurs which reduces image sharpness
Solution Approach 1:
The patent applies asymmetry by intentionally designing the aperture arrangement to be non-periodic and asymmetric with respect to the pixel structure. The apertures are positioned at specific locations that break the periodicity, thereby reducing diffraction effects while maintaining high light transmittance. This asymmetric arrangement prevents the formation of regular diffraction patterns that would otherwise degrade image quality.
Solution Approach 2:
The patent implements local quality by varying the aperture positions and sizes in different regions of the second electrode. Each aperture is strategically placed to optimize local light transmission while considering the overall diffraction pattern. The aperture arrangement is tailored to the local pixel structure, creating non-uniform distribution that reduces global diffraction effects.
2Area of stationary object
If the second electrode spreads all over the substrate, then electrode coverage is improved, but light transmittance deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the second electrode into multiple discrete aperture elements rather than forming a continuous electrode layer. This segmentation creates regions where light can pass through (apertures) while maintaining electrode functionality in other areas. The segmented structure achieves both electrode coverage and light transmittance by distributing the electrode material in a non-continuous pattern.
Solution Approach 2:
The patent utilizes a porous-like structure in the second electrode by incorporating apertures throughout the electrode layer. This porous arrangement allows light to pass through the electrode in specific regions while maintaining electrical conductivity in other regions. The aperture-filled structure achieves dual functionality of electrode coverage and optical transmission.
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 design reduces diffracted light intensity, improving image sharpness and allowing higher transmittance for optical components like cameras and sensors.
Implementation Method 1
in a case where the regions in which the second electrode is not present has periodicity, diffraction of light may occur
Data Source
AI summary
An electronic device may include a substrate, a plurality of first electrodes located on a first surface of the substrate, a plurality of organic layers located on top of the first electrodes, and a second electrode, located on top of the organic layers, that spreads so as to overlap the plurality of first electrodes in planar view. The second electrode may include a plurality of unit regions demarcated based on the plurality of first electrodes and a plurality of apertures, located in the unit regions, that do not overlap the first electrodes in planar view. Each unit region includes a unit region center point located in a center of the unit region in planar view. Each aperture includes an aperture center point located in a center of the aperture in planar view. The plurality of apertures may include a plurality of D11 apertures each displaced toward a D11 side with respect to the unit region center point and a plurality of D12 apertures each displaced toward a D12 side with respect to the unit region center point. The D12 side is a side opposite to the D11 side in planar view.