Electrooptical Device Pixel Electrode Merging for High Resolution
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Solution Overview
Problem
Existing organic thin film field-effect transistors using organic semiconductor materials face challenges in achieving high resolution and large aperture displays due to limitations in patterning size with ink-jet methods, resulting in small pixel member areas and apertures, which hinder the development of high-density and high-resolution displays.
Innovation Solution
The use of a substrate configuration with first and second switching elements, where the second pixel electrode covers the second switching element, allowing for a larger pixel electrode area and simplifying the element configuration by combining the pixel electrode and capacitor functions, enabling high-resolution and high-density displays while reducing manufacturing costs through atmospheric pressure vapor processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the minimum line width is reduced to achieve smaller pixel members, then the screen resolution is improved, but the aperture becomes small
Solution Approach 1:
The patent combines the pixel electrode and capacitor electrode into a single integrated structure. The pixel electrode serves dual functions as both the display electrode and the capacitor electrode, eliminating the need for separate capacitor electrodes and reducing the overall pixel structure footprint. This merging allows smaller pixel members to maintain adequate aperture area.
Solution Approach 2:
The pixel electrode is designed to perform multiple functions: it serves as the display electrode for controlling light transmission and simultaneously as the capacitor electrode for storing electrical charge. This multi-functionality reduces the number of separate components needed, allowing for smaller pixel dimensions while maintaining sufficient aperture area for display performance.
2Productivity
If the pixel member area is reduced to increase display density, then the screen resolution is improved, but the aperture becomes small
Solution Approach 1:
By merging the pixel electrode and capacitor electrode into a single integrated structure, the patent reduces the overall pixel member area required. This integration eliminates redundant components and allows for higher display density while maintaining adequate aperture area within the reduced pixel footprint.
Solution Approach 2:
The patent utilizes vertical stacking and three-dimensional arrangement of electrode layers to achieve functional integration. By arranging electrodes in multiple dimensions rather than only horizontal plane, the design compactly packs multiple functions into a smaller area, enabling high display density without sacrificing aperture.
3Reliability
If separate capacitor electrodes are provided to maintain display function, then the reliability is improved, but the element configuration becomes complex
Solution Approach 1:
The patent merges the pixel electrode and capacitor electrode into a single integrated structure, eliminating the need for separate capacitor electrodes. This reduction in component count simplifies the element configuration while maintaining both display function and charge storage capability through the multi-functional pixel electrode.
Solution Approach 2:
The pixel electrode is designed to perform multiple functions simultaneously: it serves as the display electrode for controlling light transmission and as the capacitor electrode for storing electrical charge. This multi-functionality reduces the number of separate components needed, simplifying the overall element configuration while maintaining reliable display operation.
Data Source
AI summary
A region of an electrooptical device includes a substrate, an active matrix switching element formed on the substrate and a pixel electrode formed on the substrate and having a first pixel electrode coupled to the switching element AM and a second pixel electrode covering a second switching element coupled to a third electrode.