Pixel Structure Dual Storage Capacitors Aperture Ratio
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Solution Overview
Problem
Conventional liquid crystal display (LCD) pixel structures face a challenge in increasing storage capacitance without compromising the aperture ratio, as larger overlapping areas for storage capacitors reduce display effectiveness.
Innovation Solution
A pixel structure with two storage capacitors formed by three layers of overlapping electrodes, where the pixel electrode and second common electrode form a first storage capacitor, and the electrode pattern and second common electrode form a second storage capacitor, allowing for increased capacitance without sacrificing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the overlapping area of drain electrode and common electrode is increased to increase storage capacitance, then storage capacitance is improved, but aperture ratio is reduced and display effect is influenced
Solution Approach 1:
The invention divides the storage capacitor into two separate capacitors (first storage capacitor and second storage capacitor) instead of using a single overlapping region. The first storage capacitor is formed between the pixel electrode and drain electrode, while the second storage capacitor is formed between the pixel electrode and common electrode. This segmentation allows the storage function to be distributed across different regions, increasing total storage capacitance without requiring a larger single overlapping area that would reduce aperture ratio.
Solution Approach 2:
The invention transitions from a two-dimensional overlapping area approach to a three-dimensional structure by utilizing multiple conductive layers. The first and second common electrode patterns are disposed at different heights (different z-dimension positions) relative to the pixel electrode, creating storage capacitors in vertical stacking arrangements. This dimensional change enables increased capacitance through layering rather than through expanding horizontal overlapping area, thereby preserving aperture ratio.
2Reliability
If the overlapping area of drain electrode and common electrode is increased to increase storage capacitance, then storage capacitance is improved, but display effect is influenced
Solution Approach 1:
By segmenting the storage capacitor into two separate capacitors with distinct electrode arrangements, the invention enables one capacitor to be positioned in a region that does not interfere with the light transmission path. The first storage capacitor (pixel electrode-drain electrode) can be configured to minimize obstruction of light, while the second storage capacitor (pixel electrode-common electrode) utilizes the common electrode region that is inherently part of the display structure. This segmentation allows storage function to be achieved without compromising display quality.
Solution Approach 2:
The invention applies different electrode configurations and material properties to different regions of the pixel structure. The first common electrode pattern and second common electrode pattern have different electrical connections and spatial arrangements optimized for their respective capacitor functions. This local optimization allows the storage capacitors to be integrated into the display structure without uniformly degrading the display properties across the entire pixel area, thereby maintaining display effect while improving storage capacitance.
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 significantly improves storage capacitance while maintaining or enhancing the aperture ratio, either by maintaining capacitance with reduced capacitor area or improving the ratio by optimizing capacitor placement.
Implementation Method 1
The pixel electrode and the second common electrode pattern partially overlap so that the pixel electrode and the second common electrode pattern form a first storage capacitor, and the electrode pattern and the second common electrode pattern partially overlap to form a second storage capacitor
Data Source
AI summary
A pixel structure of a display panel is provided. The pixel structure includes a first storage capacitor formed by a pixel electrode and a common electrode pattern, and a second storage capacitor formed by an electrode pattern and the common electrode pattern. Accordingly, the storage capacitance is greatly improved without sacrificing the aperture ratio, or the aperture ratio is improved by reducing the area of the storage capacitor while the storage capacitance is maintained.