Display Device Electrode Extensions for Capacitance Consistency
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Solution Overview
Problem
Current display devices face challenges in reducing the load on data lines and minimizing capacitance deviations between sub-pixels, which affects their performance and efficiency.
Innovation Solution
The proposed display device design includes a configuration where two sub-pixels share a data line, reducing the number of driver channels and load, and uses electrode extensions to minimize capacitance deviations by electrically connecting them at the same or similar positions, ensuring consistent performance across sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each sub-pixel is connected to a separate data line, then the capacitance deviation between sub-pixels is minimized, but the load on data lines and driver channels increases
Solution Approach 1:
The patent merges the connection paths of adjacent sub-pixels by having them share common data lines. Specifically, first sub-pixels from different pixels share a first data line, second sub-pixels share a second data line, and third sub-pixels share a third data line. This combining approach reduces the total number of data lines and driver channels while maintaining reliable signal transmission to all sub-pixels.
Solution Approach 2:
The patent introduces a multi-dimensional electrode structure with extensions that overlap across different areas. The electrodes include first extensions in first areas, second extensions in second areas, and third extensions in third areas, creating a three-dimensional connection topology that compensates for the reduced number of data lines while maintaining capacitance consistency.
2Device complexity
If data lines are shared between sub-pixels, then the driver channels and load are reduced, but capacitance deviation between sub-pixels increases
Solution Approach 1:
The patent employs a three-dimensional electrode configuration where electrodes extend across multiple areas and overlap with each other. The first extensions, second extensions, and third extensions create additional connection paths and distributed capacitance that compensate for the shared data line architecture, maintaining uniform capacitance values across all sub-pixels despite the reduced number of data lines.
Solution Approach 2:
The patent applies different electrode extension configurations to different sub-pixel types. First sub-pixels have electrodes with first extensions in first areas, second sub-pixels have electrodes with second extensions in second areas, and third sub-pixels have electrodes with third extensions in third areas. This localized optimization ensures that each sub-pixel type achieves the required capacitance value despite sharing data lines with other sub-pixels.
3Adaptability or versatility
If electrodes are connected at different positions, then the layout flexibility is improved, but capacitance deviation between sub-pixels increases
Solution Approach 1:
The patent achieves layout flexibility through a multi-layer electrode structure where extensions overlap in the vertical dimension. The first extensions, second extensions, and third extensions are positioned in different areas but overlap with each other, creating effective electrical connections while allowing horizontal layout flexibility. This vertical stacking approach decouples layout flexibility from capacitance consistency requirements.
Solution Approach 2:
The patent creates equipotential regions through overlapping electrode extensions that are electrically connected. By ensuring that extensions from different sub-pixels overlap and connect at multiple points, the patent equalizes the electrical potential and capacitance values across all sub-pixels, compensating for the fact that they connect to data lines at different physical positions.
Data Source
AI summary
A display device includes first and second pixels including first to third sub-pixels. Each of the first to third sub-pixels includes a first area disposed at a side of a pixel circuit, a second area disposed on another side of the pixel circuit, light emitting elements electrically connected to the pixel circuit, and an electrode electrically connecting the light emitting elements and the pixel circuit. The electrode of the first sub-pixel of the first pixel includes a first extension electrically connected to the pixel circuit in the first area and overlapping the second area in plan view, and the electrode of the first sub-pixel of the second pixel includes a second extension electrically connected to the pixel circuit in the second area and overlapping the first area in plan view.