Display Substrate Connection Electrodes for Voltage Drop Reduction
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Solution Overview
Problem
The high resistance of common electrode lines in liquid crystal display devices leads to voltage drops, reducing the homogeneity of the display.
Innovation Solution
The display substrate incorporates connection electrodes that connect adjacent common electrode lines in parallel, reducing resistance and voltage drops by forming a storage capacitor between the common electrode lines and the drain of thin film transistors, and optionally includes assistant common electrode lines for further resistance reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common electrode lines are used to provide common voltage, then the liquid crystal display device can operate, but the high resistance of common electrode lines causes voltage drops and reduces display homogeneity
Solution Approach 1:
The common electrode lines are segmented into multiple separate lines instead of using a single continuous line. This segmentation reduces the resistance of each individual line, thereby reducing voltage drops and improving display homogeneity across the display device.
Solution Approach 2:
Multiple common electrode lines are combined to work together in providing the common voltage to the liquid crystal display device. By distributing the current across multiple parallel lines, the overall resistance is reduced and voltage drops are minimized.
2Ease of operation
If common electrode lines are provided in the array substrate, then the common voltage can be distributed, but the high resistance leads to reduced display quality
Solution Approach 1:
The common electrode structure is divided into multiple separate electrode lines, each with lower resistance. This allows for better distribution of common voltage across the display area while maintaining manufacturing precision and display homogeneity.
Solution Approach 2:
Multiple common electrode lines are strategically positioned at different locations within the array substrate to ensure uniform voltage distribution across different regions. This local distribution approach improves display homogeneity by addressing resistance issues in specific areas.
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 improves the homogeneity of the display by reducing resistance and voltage drops on the common electrode lines, enhancing the overall image quality.
Implementation Method 1
connection electrodes connecting two adjacent common electrode lines
Implementation Method 2
forming a storage capacitor between the common electrode lines and the drain of thin film transistors
Data Source
AI summary
The present disclosure relates to a display substrate, a display device and a method for manufacturing the display substrate. The display substrate comprises a substrate, and a plurality of gate lines, a plurality of data lines and a plurality of common electrode lines which are formed above the substrate. The plurality of gate lines and the plurality of data lines are crossed to form a plurality of pixel units. Each of the plurality of pixel units comprises a thin film transistor and a pixel electrode electrically connected to the thin film transistor. The display substrate further comprises connection electrodes located above the substrate. Each of the connection electrodes connects two adjacent common electrode lines.