LCD Array Substrate Layout for Stable Pixel Voltage at Low Refresh
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Solution Overview
Problem
Large-size business LCD panels with high resolution requirements face challenges in maintaining pixel voltage due to insufficient pixel memory storage capacity under low-frequency driving, leading to unstable display characteristics.
Innovation Solution
The array substrate design includes a storage electrode that overlaps partially with the pixel electrode, forming additional storage capacitors to increase capacitance, and is connected to the common electrode, allowing for parallel storage capacitor configurations to enhance pixel voltage maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low-frequency driving is used to reduce power consumption, then power consumption is reduced, but pixel voltage becomes unstable due to insufficient storage capacitance
Solution Approach 1:
The patent introduces a storage electrode disposed on the common electrode to form storage capacitors in the thickness direction (vertical dimension), complementing the planar storage capacitors. This three-dimensional capacitor structure increases total storage capacitance without occupying additional pixel area, enabling stable pixel voltage maintenance under low-frequency driving conditions while reducing power consumption
Solution Approach 2:
The storage electrode is nested on the common electrode within the existing pixel structure, forming storage capacitors that utilize the vertical space between the common electrode and the pixel electrode. This nested configuration increases storage capacitance without expanding the pixel footprint, allowing low-frequency driving with sufficient voltage maintenance
2Measurement precision
If pixel size is reduced to increase resolution, then resolution is improved, but storage capacitance becomes insufficient for voltage maintenance
Solution Approach 1:
By disposing the storage electrode on the common electrode to form vertical storage capacitors, the patent increases storage capacitance in the thickness direction without reducing pixel area. This enables high resolution with small pixel sizes while maintaining sufficient storage capacitance for voltage stability
Solution Approach 2:
The patent merges the common electrode function with storage capacitor formation by disposing the storage electrode on the common electrode. The common electrode serves dual purposes: as the common electrode for display operation and as one terminal of storage capacitors, increasing storage capacitance without additional area consumption
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 improves pixel voltage maintenance ability, meeting the requirements of low-frequency drive and high-resolution products by increasing storage capacitance without affecting display quality.
Implementation Method 1
a storage electrode disposed on a side of the common electrode close to the first insulating layer or on a side of the common electrode away from the first insulating layer, wherein an orthograph projection of the storage electrode on a plane where the substrate disposed overlaps at least partially an orthograph projection of the pixel electrode on the plane where the substrate disposed
Data Source
AI summary
The application discloses an array substrate and a liquid crystal display panel. The array substrate includes a substrate, a common electrode, a first insulating layer, a pixel electrode and a storage electrode; A common electrode is disposed on one side of the substrate; the first insulating layer is disposed on one side of the common electrode away from the substrate; the pixel electrode is disposed on the side of the first insulating layer away from the common electrode; the storage electrode is disposed on one side of the common electrode close to or away from the first insulating layer, and the orthograph projection of the storage electrode on the plane where the substrate disposed overlaps at least partially with the orthograph projection of the pixel electrode on the plane where the substrate disposed.