Shielding Electrodes on Array Substrates for Display Devices
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Solution Overview
Problem
In liquid crystal and organic light emitting display technologies, time-varying voltage signals on gate and data lines generate transient electromagnetic signals that interfere with pixel electrodes, degrading image quality.
Innovation Solution
An array substrate with shielding electrodes disposed above the gate and data lines, electrically insulated from them, to shield these transient signals and prevent interference with pixel electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gate lines and data lines are used to transmit voltage signals, then the display device can be operated and controlled, but transient electromagnetic signals are generated that interfere with pixel electrodes and deteriorate image display quality
Solution Approach 1:
A shielding electrode is introduced as an intermediary element between the gate/data lines and the pixel electrodes. This shielding electrode is electrically connected to the gate line and positioned between the gate line and the pixel electrode, thereby intercepting and redirecting the transient electromagnetic signals before they can reach and interfere with the pixel electrodes, thus protecting the pixel electrodes while maintaining normal operation
2Object-affected harmful factors
If shielding electrodes are added to eliminate electromagnetic interference, then image display quality is improved, but device structure becomes more complex
Solution Approach 1:
The shielding electrode is merged with the existing gate line structure by establishing an electrical connection between them. Instead of treating the shielding electrode as a completely separate component, it is integrated into the gate line system, sharing the same substrate and fabrication process, thereby reducing the overall device complexity while still providing effective shielding
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
The shielding electrodes effectively eliminate the interference from transient electromagnetic signals, enhancing image display quality by protecting pixel electrodes from voltage fluctuations on the gate and data lines.
Implementation Method 1
shielding electrodes, the shielding electrodes being disposed above at least one of the gate lines and the data lines to cover at least part of the at least one of the gate lines and the data lines, and being electrically insulated from the gate lines and the data lines
Data Source
AI summary
An array substrate and a display device is disclosed, for eliminating the interference of transient electromagnetic signals caused by the time-varying voltages on the gate lines and the data lines with the voltages on the pixel electrodes. The array substrate comprises gate lines and data lines disposed on a substrate, and pixel units surrounded and separated by the gate lines and the data lines; and the array substrate further comprises shielding electrodes disposed above at least one of the gate lines and the data lines to cover at least part of the at least one and electrically insulated from the gate lines and the data lines.