Display Device Sub-Pixel Electrode Configuration for Crosstalk Reduction
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Solution Overview
Problem
Liquid crystal display (LCD) devices face challenges in achieving improved image quality due to limitations in the design of sub-pixel electrodes and switching elements, which affect light transmission and capacitance, leading to issues like vertical crosstalk and reduced aperture ratio.
Innovation Solution
The proposed display device incorporates specific configurations of sub-pixel electrodes, switching elements, and shielding lines, including dummy electrodes and connection electrodes, to minimize parasitic capacitance and optimize light transmission, with a focus on the arrangement and materials used for the electrodes and shielding lines to enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sub-pixel electrode and switching element designs are used, then device complexity is reduced, but parasitic capacitance increases and aperture ratio decreases
Solution Approach 1:
The pixel electrode is divided into multiple sub-pixel electrodes (first sub-pixel electrode and second sub-pixel electrode) with different configurations. Each sub-pixel electrode has specific dummy electrodes and connection electrodes arranged in particular patterns, allowing independent optimization of capacitance and aperture ratio for each sub-region.
Solution Approach 2:
Different regions of the pixel have different electrode configurations. The first sub-pixel electrode has dummy electrodes on one side while the second sub-pixel electrode has dummy electrodes on the other side. Connection electrodes are strategically placed at specific locations to minimize parasitic capacitance without uniformly increasing complexity across the entire pixel.
2Manufacturing precision
If more dummy electrodes and connection electrodes are added, then parasitic capacitance is minimized, but device complexity increases
Solution Approach 1:
The dummy electrodes and connection electrodes are arranged asymmetrically rather than uniformly. The first dummy electrode is positioned on one side of the first sub-pixel electrode while the second dummy electrode is positioned on the other side of the second sub-pixel electrode. This asymmetric arrangement minimizes parasitic capacitance effectively without requiring symmetric duplication of all electrode elements.
Solution Approach 2:
Instead of adding dummy electrodes around all sub-pixel electrodes uniformly, the invention applies dummy electrodes selectively to specific sub-pixel electrodes based on their positional requirements. This partial application of the dummy electrode concept achieves sufficient parasitic capacitance minimization without the excessive complexity of universal application.
3Area of stationary object
If electrode arrangements are optimized for light transmission, then aperture ratio increases, but vertical crosstalk may increase
Solution Approach 1:
Dummy electrodes serve as intermediary elements between the sub-pixel electrodes and the data lines. These dummy electrodes act as shielding structures that mediate the electric field interactions, preventing direct coupling between adjacent data lines and sub-pixel electrodes, thereby reducing vertical crosstalk while maintaining large aperture ratios.
Solution Approach 2:
The dummy electrodes are connected to the same potential as their associated sub-pixel electrodes, creating equipotential regions that extend the effective area for light transmission. This equipotential arrangement allows the aperture ratio to be increased without creating potential differences that would cause vertical crosstalk between adjacent pixels.
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 configuration reduces parasitic capacitance, minimizes vertical crosstalk, and increases the aperture ratio, resulting in improved image quality and display performance.
Implementation Method 1
This configuration reduces parasitic capacitance, minimizes vertical crosstalk
Implementation Method 2
a first shielding line disposed along the first data line and that overlaps the first data line; a second shielding line that intersects the first shielding line
Data Source
AI summary
A display device includes a gate line; first and second adjacent data lines intersecting the gate line; a first sub-pixel electrode between the first and second data lines; a second sub-pixel electrode between the first gate line and the first sub-pixel electrode; a first switching element connected to the first gate line, the first data line and the first sub-pixel electrode; a second switching element connected to the first gate line, the first data line and the second sub-pixel electrode; a connection electrode connecting the first sub-pixel electrode and the first switching element; a first dummy electrode between the first data line and the second sub-pixel electrode; and a second dummy electrode extending from the connection electrode and is disposed closer to the first data line than the second data line. End portions of the first and second dummy electrodes face each other.