Array Substrate Common Electrode Grid for LCD Voltage Stability
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Solution Overview
Problem
In liquid crystal display screens using the AD-SDS mode, the common electrode's resistance value is not maintained stably due to coupling capacitances with gate and data lines, leading to voltage instability and a 'partial green' display issue, especially in larger screens where the common electrode's size and capacitance impact the displayed color.
Innovation Solution
The common electrode signal lines and gate lines are formed in the same layer and direction, with additional common electrode connection lines extending along data lines, and a jumper is used to connect through-hole regions, reducing resistance and maintaining voltage stability across the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the common electrode size is increased for larger display screens, then the display area is improved, but the resistance value increases and voltage stability deteriorates
Solution Approach 1:
The common electrode signal transmission path is segmented into multiple parallel pathways: common electrode signal lines extending in the horizontal direction, common electrode connection lines extending in the vertical direction, and jumpers connecting through-hole regions. This segmentation creates multiple independent conduction channels, reducing the overall resistance and preventing voltage drops even when one pathway is affected by coupling capacitance.
Solution Approach 2:
The patent transitions from a single-direction (horizontal) signal transmission approach to a two-dimensional network of signal lines. Common electrode signal lines extend horizontally between pixel units, while common electrode connection lines extend vertically through through-hole regions, creating a grid-like structure that provides redundant transmission paths in multiple dimensions.
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 reduces the resistance value between pixel units, ensuring stable common electrode voltage and preventing deflection of liquid crystals, thus eliminating the 'partial green' display issue, and is suitable for both small and large-sized screens.
Implementation Method 1
the resistance value of the common electrode in the horizontal direction, that is, a resistance value of the common electrode signal line between common electrodes for the plurality of pixel units in the horizontal direction, is much less than that of the common electrode signal line in the vertical direction
Implementation Method 2
the voltage on the common electrode will be often affected by coupling capacitances between the common electrode and the gate lines and the data lines
Data Source
AI summary
Embodiments of the present invention disclose an array substrate and a method of manufacturing the same, and a liquid crystal display screen. The array substrate comprises gate lines, data lines arranged to intersect the gate lines, common electrode signal lines, and a plurality of pixels defined by the gate lines and the data lines, wherein each pixel comprises a drive transistor, a pixel electrode connected with one of a source electrode and a drain electrode of the drive transistor while the other one of the source electrode and the drain electrode of the drive transistor is connected with the respective data line, and a common electrode electrically connected with the respective common electrode signal line, and, the common electrode signal lines and the gate lines are formed in the same layer and extend in the same direction as the gate lines, wherein each pixel further comprises a common electrode connection line formed in the same layer as the respective common electrode signal line and extending in a direction of the respective data line, and the common electrode connection line is electrically connected with the respective common electrode signal line and the respective common electrode. Embodiments of the present invention is made so that the pixel resistance value is reduced, reducing the phenomenon of partial green picture in the liquid crystal display screen as a whole.