Shift Register Unit With Detection Circuit For Abnormal Node Potential Compensation
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Solution Overview
Problem
Conventional display devices face issues due to abnormal voltage at nodes in shift register units within gate driving circuits, leading to abnormal output signals that affect display performance.
Innovation Solution
A shift register unit with a detection circuit that samples and holds node potentials for analog-to-digital conversion, allowing for detection and compensation of abnormal potentials, and a gate driving circuit with cascaded shift register units and detection units to identify and adjust signal terminals accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detection circuit is added to detect node potentials, then the ability to detect abnormal potentials is improved, but the device complexity increases
Solution Approach 1:
The gate driving circuit is divided into multiple independent shift register units, each with its own detection circuit. This segmentation allows localized detection of abnormal potentials without requiring a complex centralized detection system, reducing overall device complexity while maintaining measurement precision.
Solution Approach 2:
A detection circuit acts as an intermediary between the shift register circuit and the control logic. The detection circuit samples node potentials and converts them to detection signals that can be processed by the control unit, simplifying the interface between analog detection and digital control while improving measurement capability.
2Reliability
If multiple detection circuits are added to monitor different nodes, then the coverage of detection is improved, but the device complexity increases
Solution Approach 1:
The detection circuit is designed as a universal module that can be replicated across multiple shift register units. Each detection circuit performs the same function of sampling and converting node potentials, allowing standardized implementation that reduces design complexity while expanding detection coverage.
Solution Approach 2:
The detection circuit is nested within each shift register unit, with the detection node integrated into the existing circuit topology. This nesting allows multiple detection circuits to be implemented without proportionally increasing overall system complexity, as each detection circuit utilizes the local node structure of its parent shift register unit.
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
Enables effective detection and adjustment of abnormal node potentials, ensuring stable output signals and improved display performance by correcting voltage anomalies in the gate driving circuit.
Implementation Method 1
a sample and hold sub-circuit coupled to the detection node, the sample and hold sub-circuit is configured to sample and hold the potential of the detection node to obtain a sample signal
Implementation Method 2
an analog-to-digital conversion sub-circuit configured to perform analog-to-digital conversion on the sample signal from the sample and hold sub-circuit to obtain the detection signal
Data Source
AI summary
The present disclosure provides a shift register unit, a gate driving circuit and compensation method and driving method thereof, and a display device. The shift register unit includes: a shift register circuit having a detection node, the shift register circuit is configured to receive an input signal and a clock signal, and generate an output signal based on the clock signal under control of the input signal; and a detection circuit coupled to the detection node of the shift register circuit, the detection circuit is configured to generate a detection signal based on a potential of the detection node.