Pixel Structure With Surrounding Electrode For High Aperture Ratio
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Solution Overview
Problem
In high-resolution liquid crystal display devices, dividing a pixel into multiple domains while maintaining a high aperture ratio becomes increasingly difficult due to the smaller size of individual pixels, leading to varying screen brightness at different viewing angles.
Innovation Solution
A pixel structure is designed with a data line, scan line, common signal line, first and second switching elements, and pixel electrodes, where the second pixel electrode surrounds the first, allowing the pixel to be divided into domains and enhancing the aperture ratio through a storage capacitor formed by a shared capacitor electrode line, and optimizing the shape and slits of the electrodes to improve liquid crystal guidance and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a pixel is divided into multiple domains to relieve viewing angle issues, then the phase delay uniformity is improved, but the aperture ratio deteriorates due to increased electrode and signal line complexity
Solution Approach 1:
The pixel is divided into multiple domains (first domain with first pixel electrode, second domain with second pixel electrode) to achieve different liquid crystal rotation directions in different regions, thereby relieving viewing angle issues and improving phase delay uniformity across different viewing positions
Solution Approach 2:
The capacitor electrode line is shared between the first and second switching elements, merging the capacitor structures of both domains. This shared capacitor electrode line design reduces the total area occupied by capacitor structures, thereby improving the aperture ratio while maintaining multiple domain functionality
Solution Approach 3:
The capacitor electrode line serves dual functionality by acting as both the capacitor electrode for the first switching element and the capacitor electrode for the second switching element. This multi-functional design eliminates the need for separate capacitor electrodes for each domain, increasing the effective aperture area
2Measurement precision
If the pixel size is reduced to increase resolution, then the measurement precision is improved, but the difficulty of dividing into multiple domains while maintaining aperture ratio increases
Solution Approach 1:
The capacitor electrode line is merged to serve both switching elements, reducing the number of separate components needed in each pixel. This merging approach simplifies the overall structure and reduces fabrication complexity even as pixel dimensions shrink for higher resolution displays
Solution Approach 2:
The shared capacitor electrode line performs multiple functions for both domains within the reduced pixel area, eliminating the need for separate capacitor structures in each domain. This multi-functional design reduces device complexity while maintaining the multi-domain capability necessary for high-resolution displays
Data Source
AI summary
A pixel structure includes a data line, a scan line, a common signal line, a first switching element, a second switching element, a first pixel electrode, and a second pixel electrode. The first switching element is electrically connected to the scan line and the data line. The second switching element is electrically connected to the scan line and the common signal line. The first pixel electrode is electrically connected to the first switching element. The second pixel electrode is electrically connected to the second switching element. The second pixel electrode surrounds the first pixel electrode.