Array Substrate Common Electrode Layout for Large-Display Signal Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In large-sized displays with narrow bezels, the increased resistance of signal lines and high coupling capacitance lead to signal distortion and potential drift, causing image sticking and affecting display quality.
Innovation Solution
The array substrate includes a common electrode, first, second, and third common signal lines, and feedback signal lines, which are coupled to a conductive frame and a circuit board to compensate for common voltage signals, thereby reducing signal delay and distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display size is increased with narrow bezels, then the display area is enlarged, but the signal line resistance increases and coupling capacitance increases causing signal distortion
Solution Approach 1:
The common electrode is divided into multiple regions (first region, second region, third region, fourth region) corresponding to different signal line groups. This segmentation allows independent voltage compensation for each region, addressing the signal distortion caused by high resistance and coupling capacitance in large displays.
Solution Approach 2:
Different common voltage signals are applied to different regions of the common electrode based on their specific signal line characteristics. The first and second common signal lines receive different compensation voltages from the third and fourth signal lines respectively, optimizing signal quality locally in each display region.
2Reliability
If multiple common signal lines are added to compensate for signal distortion, then signal quality is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple common signal lines (first, second, third, and fourth common signal lines) into a unified compensation system that shares the conductive frame and coordinate system. This merging approach reduces overall complexity compared to completely independent signal line systems while maintaining the ability to provide region-specific compensation.
Data Source
AI summary
An array substrate has a display area and a bonding region. The display area includes a distal region, a proximal region, and a middle region therebetween. The array substrate includes a base, a common electrode located in the display area, a connecting lead disposed outside the distal region, a conductive frame at least partially surrounding the display area, and at least one first common signal line, at least one second common signal line and at least one third common signal line. The first common signal line, the second common signal line and the third common signal line are respectively coupled to portions of the common electrode located in the distal region, the proximal region and the middle region. The first common signal line is coupled to the connecting lead. The connecting lead and the portion of the common electrode located in the distal region are coupled to the conductive frame.