Shift Register Unit With Reset Stabilizing Circuit
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Solution Overview
Problem
The stability of output signals in Gate Driver On Array (GOA) circuits for display panels is compromised due to leakage phenomena and electromagnetic compatibility issues, leading to poor display quality.
Innovation Solution
A shift register unit comprising an input circuit, output circuit, reset circuit, control circuit, and reset stabilizing circuit, which includes a reset stabilizing circuit to intermittently charge a node and ensure the output circuit is disconnected, preventing signal interference and improving signal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output circuit remains connected during reset periods, then the circuit structure is simple, but the output signal stability deteriorates due to leakage and electromagnetic interference
Solution Approach 1:
The reset stabilizing circuit performs preliminary action by preemptively disconnecting the output circuit before the reset operation begins. The control circuit detects the reset signal and activates the disconnection mechanism in advance, preventing leakage and electromagnetic interference from affecting the output signal before they can occur
Solution Approach 2:
The reset stabilizing circuit acts as an intermediary component between the output circuit and the reset circuit. It mediates the interaction by controlling the connection state of the output circuit based on the reset signal, thereby isolating the output circuit during reset periods without requiring structural changes to the core output circuitry
2Reliability
If the output circuit is disconnected during reset periods, then signal interference is prevented, but the circuit complexity increases due to additional control mechanisms
Solution Approach 1:
The reset stabilizing circuit merges the disconnection control function with the existing reset mechanism. By integrating the detection of reset signals and the activation of disconnection into a unified control process, the patent avoids adding separate complex control systems while still achieving the goal of preventing signal interference during reset periods
Solution Approach 2:
The control circuit performs self-service by automatically detecting the reset signal state and autonomously controlling the connection state of the output circuit. This self-regulating mechanism eliminates the need for external complex control systems, as the circuit monitors and adjusts itself based on the reset signal conditions
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 proposed solution enhances the stability of output signals, preventing interference and improving display quality by ensuring the output circuit is disconnected during reset periods, thereby maintaining signal integrity.
Implementation Method 1
a reset stabilizing circuit to intermittently charge a node and ensure the output circuit is disconnected
Data Source
Figure 1~2
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Figure 5~6A
AI summary
A shift register unit (10), a gate drive circuit (20) and a display device (30) are disclosed. The shift register unit (10) includes an input circuit (100), an output circuit (200), a reset circuit (300), a control circuit (400) and a reset stabilizing circuit (500). The input circuit (100) is configured to write an input signal into a first node (N1) in response to an input start signal. The output circuit (200) is configured to output a preparatory output signal to an output terminal (Output) under control of an electric level of the first node (N1). The reset circuit (300) is configured to reset the output terminal (Output) under control of an electric level of a second node (N2). The control circuit (400) is configured to apply a first voltage signal to the second node (N2) in response to a control signal. The reset stabilizing circuit (500) is configured to apply a second voltage signal to the first node (N1) in response to a reset stabilizing signal. The shift register unit (10) can improve the stability of the output signal, avoid the interference of other signals, and improve the display quality.