Array Substrate Storage Capacitor Design for Display Homogeneity
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Solution Overview
Problem
The liquid crystal display panel industry faces challenges in increasing storage capacitance to reduce kickback voltage, which affects display homogeneity and leads to issues like image sticking.
Innovation Solution
An array substrate design that includes a conductor plate electrically connected to the common electrode, forming a storage capacitor with the sub pixel electrode, which increases the total confronting area and thus the capacitance, improving display homogeneity and reducing kickback voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the storage capacitance is increased to reduce kickback voltage, then the display homogeneity is improved, but the device structure becomes more complex
Solution Approach 1:
The patent combines the common electrode and conductor plate to collectively form one electrode plate of the storage capacitor, while the sub pixel electrode serves as the other electrode plate. This merging approach increases the confronting area for capacitance storage without requiring separate dedicated capacitor structures, thereby improving display homogeneity while avoiding additional structural complexity
Solution Approach 2:
The common electrode serves dual functions: as a common electrode for liquid crystal alignment and as part of the storage capacitor structure (forming one electrode plate together with the conductor plate). This multi-functionality increases the storage capacitance without requiring additional dedicated components, resolving the contradiction between reliability improvement and structural simplification
2Reliability
If the storage capacitance is increased to reduce kickback voltage, then the display homogeneity is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the common electrode and conductor plate to form one electrode plate of the storage capacitor. This integration allows the storage capacitor to be formed using existing structural elements and their corresponding insulation layers, avoiding the need for separate capacitor fabrication processes and simplifying manufacturing while improving display homogeneity
Solution Approach 2:
The common electrode and conductor plate collectively serve as one electrode plate of the storage capacitor, enabling the structure to fulfill both its original function and the additional capacitance storage function. This multi-functionality increases storage capacitance without requiring additional manufacturing steps or specialized processes
3Reliability
If the confronting area of the storage capacitor is increased, then the capacitance is increased, but the aperture ratio may be reduced
Solution Approach 1:
The patent merges the common electrode and conductor plate to form one electrode plate of the storage capacitor. This integration increases the effective confronting area for capacitance storage without requiring additional dedicated space, as the existing structural footprint is utilized more efficiently, thereby increasing capacitance while maintaining aperture ratio
Solution Approach 2:
The common electrode and conductor plate collectively function as one electrode plate of the storage capacitor, enabling the structure to serve multiple purposes within the same spatial footprint. This multi-functionality increases the storage capacitance by effectively utilizing the existing area, avoiding the need for additional space that would reduce the aperture ratio
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
The increased storage capacitance enhances display panel performance by reducing kickback voltage and preventing displaying abnormalities such as image sticking, while maintaining aperture ratio and simplifying fabrication.
Implementation Method 1
the common electrode and the sub pixel electrode collectively form a first confronting area therebetween and the conductor plate and the sub pixel electrode collectively form a second confronting area therebetween such that a storage capacitor is formed
Implementation Method 2
a storage capacitor is formed, collectively, between the common electrode and the sub pixel electrode and between the conductor plate and the sub pixel electrode
Data Source
AI summary
An array substrate includes a plurality of pixel units arranged in an array. Each of the pixel units includes a common electrode, a first insulation layer, a sub pixel electrode, a second insulation layer, and a conductor plate that are sequentially stacked. The conductor plate is electrically connected to the common electrode. The common electrode and the sub pixel electrode collectively form therebetween a first confronting area and the conductor plate and the sub pixel electrode collectively form therebetween a second confronting area, such that a storage capacitor is formed, collectively, between the common electrode and the sub pixel electrode and between the conductor plate and the sub pixel electrode. The above-described array substrate provides a relatively large storage capacitor. Also disclosed is a display panel.