Display Panel Active Matrix Substrate Electrode Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The proper alignment of metal layers in active array matrix substrates of display panels is challenging due to manufacturing errors, which can affect the capacitance between electrodes and impact display quality.
Innovation Solution
The design incorporates specific overlapping configurations between the source and drain electrodes and the gate electrodes, ensuring that the capacitance is preserved even when the positions of the metal layers shift relative to each other, through the use of protruding and extending portions that maintain electrical coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If standard metal layer alignment is used in manufacturing, then manufacturing process is simple, but alignment precision deteriorates due to manufacturing errors
Solution Approach 1:
The source electrode and drain electrode are divided into multiple segments including protruding portions and extending portions. This segmentation allows each part to independently compensate for alignment shifts, maintaining capacitance without requiring higher overall manufacturing precision.
Solution Approach 2:
The electrode structures are pre-designed with protruding and extending portions that anticipate potential alignment shifts. These features are built in advance to automatically compensate for manufacturing errors, eliminating the need for post-manufacturing adjustment.
2Ease of manufacture
If metal layers are shifted relative to each other, then manufacturing tolerance is relaxed, but capacitance between electrodes deteriorates
Solution Approach 1:
The electrode geometry is modified by changing parameters such as adding protruding portions and extending portions. These parameter changes ensure that the overlapping area between electrodes remains sufficient even when layers are shifted, maintaining capacitance consistency.
Solution Approach 2:
The design converts the harmful effect of layer shifting into a beneficial feature. The protruding and extending portions are specifically designed to utilize potential shift directions, ensuring that even misalignment maintains or enhances the overlapping area and capacitance.
3Reliability
If overlapping area between electrodes is increased, then capacitance is improved, but area occupied by electrodes increases
Solution Approach 1:
Instead of uniformly increasing the area of all electrodes, the design applies local quality enhancement by adding protruding portions only in critical overlapping regions. This ensures capacitance is maintained in key areas without proportionally increasing the total electrode area.
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 configuration ensures consistent capacitance between the electrodes, maintaining display quality despite potential shifts in the metal layers, thereby addressing alignment issues and ensuring reliable performance.
Implementation Method 1
the capacitance between the gate electrode and the source electrode and between the gate electrode and the drain electrode is preserved
Data Source
AI summary
An active array matrix substrate of a display panel includes a number of scan lines parallel to each other and arranged in a first metal layer of a first substrate, a number of data lines parallel to each other and arranged in a second metal layer of the first substrate, a number of gate electrodes arranged in the first metal layer, a number of source electrodes arranged in the second metal layer, and a number of drain electrodes arranged in the second metal layer. The source electrode includes at least one source extending portion spaced from and configured to overlap with the first metal layer. The drain electrode includes at least one drain extending portion spaced from and configured to overlap with the first metal layer.