Display Device Gate Line Routing to Reduce Capacitive Coupling
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Solution Overview
Problem
Capacitive coupling between gate lines and pixel circuits in display devices leads to brightness abnormalities, as existing arrangements can cause voltage level fluctuations affecting the charging and light emission of pixel circuits.
Innovation Solution
The display device incorporates a specific arrangement of gate lines, transmission lines, and pixel circuits, where the transmission lines cross over the gate lines to minimize capacitive coupling, ensuring that the voltage levels of the pixel circuits are maintained unchanged during charging operations by adjusting the distances and configurations of these lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If gate lines and transmission lines are arranged in a conventional parallel configuration, then the device complexity is reduced, but capacitive coupling causes voltage level fluctuations in pixel circuits leading to brightness abnormalities
Solution Approach 1:
The patent applies dimensionality change by routing the second transmission line (VG3) to cross over the second gate line (HG3) in a vertical dimension rather than running parallel in the same plane. This spatial reconfiguration reduces the capacitive coupling area between the transmission line and pixel circuits, thereby minimizing voltage fluctuations and brightness abnormalities while maintaining a relatively simple overall device structure
2Speed
If transmission lines are positioned close to pixel circuits for efficient signal transmission, then the speed of signal transmission is improved, but capacitive coupling causes voltage level changes in pixel circuits
Solution Approach 1:
The patent applies local quality by differentiating the spatial relationships between different transmission lines and gate lines. The first transmission line (VG2) is positioned to cross over the first gate line (HG2), while the second transmission line (VG3) is specifically arranged to cross over the second gate line (HG3) at a location that minimizes capacitive coupling with pixel circuits. This localized optimization ensures fast signal transmission while maintaining voltage stability in pixel circuits
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 arrangement reduces brightness abnormalities by preventing voltage level fluctuations in the pixel circuits, thereby stabilizing the light emission and improving the overall performance of the display device.
Implementation Method 1
Capacitive coupling between gate lines of the gate signals and the pixel circuits and the data lines may cause brightness abnormal of the display device
Data Source
AI summary
A display device includes first and second pixel circuits, first and second gate lines, and first and second transmission lines. The first pixel circuit emits light according to a data signal, and is charged according to a first gate signal. The second pixel circuit emits light according to the data signal, and is charged according to a second gate signal. The first gate line is located between the first second pixel circuits, and provides the first gate signal. The second gate line provides the second gate signal. The first transmission line provides the second gate signal to the second gate line. The second transmission line is located between the first transmission line and the second pixel circuit, crosses over the second gate line, and provides the first gate signal to the first gate line.