Array Substrate Capacitor Plate Layout to Prevent Display Split-Screens
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Solution Overview
Problem
Split-screens occur on display panels due to uneven static charge accumulation on capacitor plates in the array substrate, leading to inconsistent bias voltage and characteristic shifts in drive transistors, affecting the display effect.
Innovation Solution
The array substrate design includes capacitor plates arranged in an array with gaps between them, preventing the formation of large-area capacitor metal blocks that easily accumulate static charges, ensuring equal static charge attraction and minimal accumulation, thereby reducing the difference in static charges across the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If capacitor plates are arranged in an array with connections forming large-area capacitor metal blocks, then the manufacturing process is simplified, but static charge accumulation increases causing split-screen phenomenon
Solution Approach 1:
The patent divides the capacitor metal blocks into smaller, isolated units by introducing gaps between adjacent capacitor plates. This segmentation prevents the formation of large continuous metal areas, thereby reducing static charge accumulation while maintaining the functional capacitance needed for drive transistor operation. The segmented structure is achieved through precise patterning of the capacitor plates in the first metal layer.
Solution Approach 2:
The patent applies different structural characteristics to different regions of the capacitor plates. Specifically, the capacitor plates are designed with local gaps in certain areas to control static charge distribution, while maintaining continuous structures in other areas to ensure proper electrical connectivity. This local differentiation allows optimization of static charge resistance without compromising overall device functionality.
2Object-affected harmful factors
If capacitor plates are isolated with gaps to reduce static charge, then split-screen phenomenon is prevented, but manufacturing complexity increases
Solution Approach 1:
The capacitor plates are segmented into discrete units with controlled gaps between them. This segmentation approach systematically manages static charge by creating isolated charge storage regions, preventing the formation of large continuous metal blocks that would accumulate excessive static charge. The segmented design is implemented through standard photolithography patterning processes.
Solution Approach 2:
The patent designs the capacitor plate structures to achieve equipotential regions that balance charge distribution across the display panel. By carefully controlling the gap sizes and positions between adjacent capacitor plates, the design ensures uniform electrostatic potential in regions prone to split-screen effects, thereby preventing display anomalies while maintaining manufacturing feasibility.
3Ease of manufacture
If large-area capacitor metal blocks are used, then manufacturing is easier, but bias voltage consistency deteriorates causing characteristic shifts
Solution Approach 1:
The capacitor metal blocks are segmented into smaller, isolated capacitor plate units with gaps between them. This segmentation prevents the formation of large continuous metal areas that would create non-uniform electric fields and bias voltage variations. The segmented structure ensures more consistent bias voltage across different regions of the display panel, eliminating characteristic shifts in drive transistors.
Solution Approach 2:
The patent introduces local gap structures in specific regions of the capacitor plates to control and uniformize the electric field distribution. These local modifications to the capacitor plate geometry ensure consistent bias voltage application to drive transistors across the entire display panel, preventing characteristic shifts while maintaining ease of manufacture through standard patterning techniques.
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 minimizes static charge accumulation and its impact on drive transistors, preventing split-screens and improving the display effect by maintaining consistent performance across the display panel.
Implementation Method 1
the first metal layer includes capacitor plates arranged in an array along the first direction and the second direction
Data Source
AI summary
Provided are an array substrate mother board, an array substrate, a display panel and a display device. The array substrate mother board includes array substrates, the array substrate includes a component disposing area; the array substrate includes a base substrate and a drive circuit layer, the drive circuit layer includes a first metal layer, and the first metal layer includes capacitor plates arranged in an array along the first direction and along the second direction; the plurality of array substrates include first-type array substrates, and the plurality of first-type array substrates are arranged along the first direction and are adjacent to a boundary extending along a first direction in the mother board of the array substrate.