Array Substrate Capacitance Compensation for Display Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The array substrate with a dual gate+Z architecture experiences shake-head stripes due to differing coupling voltages of source-drain electrodes, leading to uneven pixel brightness and visibility issues when the display is viewed at different angles.
Innovation Solution
The array substrate design includes specific configurations of pixel switches, conductive structures, and common electrodes to equalize lateral coupling capacitances between pixel electrodes, ensuring uniform pixel brightness by partially overlapping conductive structures with gate lines and optimizing electrode arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If column inversion driving method is adopted in dual gate+Z architecture, then power consumption is reduced, but coupling voltages of source-drain electrodes become different resulting in uneven pixel brightness
Solution Approach 1:
The patent introduces asymmetric conductive structures (first conductive structures and second conductive structures) with different configurations to compensate for the asymmetric coupling capacitances caused by different distances between pixel electrodes and driver transistors. The first conductive structures are positioned closer to first pixel electrodes while second conductive structures are positioned closer to second pixel electrodes, creating asymmetric compensation that equalizes the total coupling capacitances.
Solution Approach 2:
The patent adjusts the parameters of conductive structures (such as width, length, and position) to modify the coupling capacitance values. By changing the geometric parameters of the conductive structures, the coupling capacitances are tuned to achieve uniform pixel brightness while maintaining the column inversion driving method's low power consumption advantage.
2Device complexity
If pixel electrodes are arranged in Z shape with different distances to driver transistors, then device integration is achieved, but coupling voltages differ causing shake-head stripes
Solution Approach 1:
The patent introduces conductive structures as intermediary elements between the pixel electrodes and the gate lines. These intermediary conductive structures serve as capacitance compensation elements that mediate the coupling relationship, allowing the Z-shaped pixel electrode arrangement to be maintained while eliminating the harmful shake-head stripes through capacitance equalization.
3Manufacturing precision
If conductive structures are added to equalize coupling capacitances, then pixel brightness uniformity is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the conductive structures with existing gate lines or other conductive elements in the display device. By combining multiple functions into unified structures, the patent achieves capacitance compensation without proportionally increasing the number of separate manufacturing steps, thus reducing the impact on manufacturing complexity.
Data Source
AI summary
The present disclosure provides an array substrate and a preparation method therefor, and a display panel. The array substrate includes a plurality of pixel pairs distributed in an array, where two gate lines are provided between two adjacent rows of pixel pairs, and each the pixel pair includes a first pixel electrode and a second pixel electrode arranged side by side and connected to the same data line, a first pixel switch and a second pixel switch electrically connected with the first pixel electrode and the second pixel electrode, respectively, in an extension direction of the data line, the first pixel switch and the second pixel switch being distributed in pairs between two different pixel pairs, respectively, and a first pixel switch and a second pixel switch corresponding to a pixel pair being located at both sides of the pixel pair, and a first conductive structure.