Array Substrate Electrode Layout for Uniform Storage Capacitance
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Solution Overview
Problem
Current display devices suffer from issues such as screen flickering and jittering, particularly when displaying blue images, due to uneven storage capacitance and alignment fluid diffusion, which affects the display effect.
Innovation Solution
The array substrate incorporates lap and auxiliary electrodes in the common signal lines, reducing the need for vias and ensuring uniform storage capacitance, thereby minimizing flickering and jittering by maintaining consistent voltage differences across sub-pixel regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional common signal line structures are used, then device complexity is reduced, but screen flickering and jittering occur due to uneven storage capacitance
Solution Approach 1:
The common signal line is segmented into multiple electrode structures (first electrode structure, second electrode structure, third electrode structure) distributed across different sub-pixel regions. Each electrode structure independently contributes to storage capacitance, ensuring uniform distribution and eliminating flickering caused by uneven capacitance concentration.
Solution Approach 2:
Different electrode structures are selectively disposed in different sub-pixel regions (red, green, blue sub-pixels) with specific geometric configurations. The first electrode structure extends in a first direction, the second in a second direction, and the third connects common signal lines, creating locally optimized capacitance distribution tailored to each region's requirements.
2Manufacturing precision
If uniform storage capacitance is achieved through multiple electrode structures, then display uniformity improves, but manufacturing complexity increases
Solution Approach 1:
Multiple electrode structures are merged into a single continuous common signal line that traverses through red, green, and blue sub-pixel regions. This integration allows uniform capacitance distribution to be achieved without requiring separate fabrication processes for each electrode, simplifying manufacturing while maintaining precision.
Solution Approach 2:
The common signal line serves multiple functions simultaneously: it provides electrical connection to the common electrode layer, creates storage capacitance through overlapping with pixel electrodes, and distributes signals uniformly across different colored sub-pixels through its multi-directional electrode structures.
3Reliability
If lap and auxiliary electrodes are used in common signal lines, then flickering and jittering are reduced, but device structure becomes more complex
Solution Approach 1:
The lap electrode and auxiliary electrode are electrically connected to the common electrode layer, creating equipotential regions that stabilize the electrical potential across different sub-pixel areas. This equipotential design eliminates potential differences that cause flickering and jittering, improving display stability.
Solution Approach 2:
The auxiliary electrode acts as an intermediary element that connects and balances the electrical potential between different electrode structures and the common electrode layer. It mediates potential differences and ensures uniform voltage distribution, reducing display instability without requiring complex additional components.
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 effectively reduces the occurrence of screen flickering and jittering, enhances display uniformity, and improves the overall display quality by ensuring consistent brightness and capacitance across sub-pixel regions.
Implementation Method 1
a pixel electrode layer and a common electrode layer that are disposed on the substrate... electrically connected to the common electrode layer
Data Source
AI summary
Provided is an array substrate having sub-pixel regions. The array substrate includes: a substrate; a pixel electrode layer and a common electrode layer that are disposed on the substrate, wherein the pixel electrode layer comprises pixel electrodes disposed in the sub-pixel regions in a one-to-one correspondence manner; and common signal lines disposed on the substrate. The array substrate further includes data lines, gate lines, and transistors; wherein each data line among the data lines is electrically connected to first electrodes of the transistors in a same column of the transistors, an orthographic projection of the data line on the substrate passing through orthographic projections of gate electrodes of the transistors in the same column of the transistors on the substrate, and second electrodes of the transistors are connected to the pixel electrodes correspondingly.