Active Matrix Substrate Signal Timing and Terminal Reduction
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Solution Overview
Problem
Existing display devices with active matrix substrates suffer from delayed control signal arrival at thin film transistors, leading to blunted waveforms and degraded display quality. Additionally, the increased number of gate terminals and input terminals on the substrate enlarges the frame region, complicating inspection and potentially damaging gate terminals.
Innovation Solution
The proposed active matrix substrate includes a substrate with thin film transistors, a gate line group, first and second gate drive circuits, control signal lines, gate terminals, and a connection line that connects the control signal lines. This configuration allows control signals to be supplied directly to the gate drive circuits, reducing waveform blunting and improving timing accuracy for thin film transistor operation. Furthermore, the number of input terminals is reduced by sharing inspection signals across multiple signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control signals are supplied through a wiring line from one gate driver to the other gate driver, then the gate drivers can be connected, but the control signal arrival time is delayed and the waveform is blunted, degrading display quality
Solution Approach 1:
The patent divides the control signal supply into two independent paths: one from the first gate driver to the first gate terminal, and another from the second gate driver to the second gate terminal. This segmentation eliminates the need for control signals to traverse a long wiring line between gate drivers, reducing signal delay and waveform blunting while maintaining reliable connection between both gate drivers.
2Reliability
If two gate terminals and two signal lines are provided to improve display quality, then control signals can reach gate drivers timely, but the number of terminals increases, enlarging the frame region
Solution Approach 1:
The patent makes the gate terminals serve dual functions: they act as both control signal input terminals for the gate drivers and as inspection terminals. The first gate terminal receives control signals for the first gate driver and also serves as an inspection terminal, while the second gate terminal performs the same function for the second gate driver. This multi-functionality reduces the total number of terminals needed, thereby reducing the frame region area while maintaining display quality.
3Reliability
If the number of gate terminals and input terminals increases, then control signals can be supplied properly, but the frame region dimensions increase, complicating inspection and potentially damaging gate terminals
Solution Approach 1:
The patent merges the function of control signal input terminals with inspection terminals by using the same physical gate terminals for both purposes. The first gate terminal and second gate terminal each serve as both control signal inputs for their respective gate drivers and as inspection terminals. This merging reduces the total number of terminals, simplifying the device structure and reducing the frame region dimensions while ensuring proper control signal supply.
Data Source
AI summary
Provided is a display device including gate drive circuits, a signal line connected to the gate drive circuit, a signal line connected to the gate drive circuit, a gate terminal, inspection terminals, and a connection line. The connection line connects the signal line and the signal line. The inspection terminal is disposed on the signal line. The inspection terminal is disposed on the signal line. The inspection terminals are terminals input with an inspection signal at the time of inspection.