Array Substrate Capacitance Compensation for Uniform Edge Charging
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Solution Overview
Problem
In thin-film transistor liquid crystal display (TFT-LCD) panels, the edges of the display panel exhibit poor display effects due to higher charging rates of display pixels at the edges, caused by the disconnection of data lines shared with dummy pixels, leading to uneven charging rates.
Innovation Solution
The array substrate and display panel design includes a second data line configuration with a trunk and branch portion that overlaps dummy pixel electrodes, forming capacitances to increase the capacitive load, ensuring equal charging rates across all pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data line connected to dummy pixels is disconnected to ensure dummy pixels do not display, then the dummy pixels are prevented from displaying, but the charging rate of display pixels at the edges becomes higher than other pixels, leading to poor display effects at the edges
Solution Approach 1:
The patent introduces a compensation capacitance as an intermediary element connected to the data line. This compensation capacitance acts as a mediator that balances the capacitive load on data lines serving edge display pixels, thereby equalizing charging rates without affecting the disconnection status of dummy pixel data lines. The compensation capacitance compensates for the reduced load that would otherwise cause accelerated charging at edge positions.
2Manufacturing precision
If dummy pixels are disposed at the edges of the display region to ensure etching uniformity, then the etching uniformity is improved, but the display pixels and dummy pixels share a data line that becomes imbalanced when disconnected, causing edge display defects
Solution Approach 1:
The patent applies local quality by introducing compensation capacitance specifically at edge data line positions where the capacitive load imbalance occurs. This localized compensation targets only the affected edge regions without altering the overall dummy pixel structure or etching process, thereby maintaining etching uniformity while correcting the local display quality issue at panel edges.
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 equalizes the charging rates of display pixel units, thereby alleviating poor display effects at the edges of the panel by reducing the charging rate disparity.
Implementation Method 1
A projection of the second data line at least overlaps a portion of one of the dummy pixel electrodes to form an overlapping region
Data Source
AI summary
The present application provides an array substrate and a display panel. The present application changes a configuration of a data line positioned between one of display pixel units and one of dummy pixel units to reduce a charging rate of the display pixel units corresponding to the data lines and ensure that the charging rate is equal to a charging rate of other pixel units, thereby relieving poor display effects at edges of the display panel.