Shift Register Circuit Noise Reduction via Discharge Node Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shift register circuits in display devices face challenges in effectively managing noise reduction and maintaining normal output operations due to the potential interference of noise reduction circuits with pull-up and output terminals, especially when the input signal is at an effective potential.
Innovation Solution
The proposed shift register circuit incorporates an input sub-circuit, an output sub-circuit, a discharge sub-circuit, and a noise reduction sub-circuit, where the discharge sub-circuit controls the pull-down node to an ineffective potential under an effective input signal, preventing noise reduction sub-circuit interference and ensuring normal output by setting the first power source signal to an ineffective potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the noise reduction sub-circuit is activated to reduce noise, then noise reduction is improved, but the output operation may be interfered with and normal output may fail
Solution Approach 1:
The patent applies preliminary action by controlling the discharge sub-circuit to set the pull-down node to an ineffective potential before the noise reduction sub-circuit operates. This preliminary configuration prevents the noise reduction sub-circuit from interfering with the pull-up and output terminals, ensuring that noise reduction can be performed without compromising output operation reliability.
Solution Approach 2:
The patent implements dynamics by making the potential of the pull-down node changeable based on the input signal state. When the input signal is at an effective potential, the discharge sub-circuit dynamically adjusts the pull-down node to an ineffective potential, allowing the circuit to adapt its noise reduction behavior according to operational conditions while maintaining output reliability.
2Reliability
If the discharge sub-circuit controls the pull-down node to prevent noise reduction interference, then output reliability is improved, but circuit complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the circuit into distinct functional sub-circuits: input sub-circuit, output sub-circuit, discharge sub-circuit, and noise reduction sub-circuit. Each sub-circuit has a specific function, and the discharge sub-circuit is specifically designed to control the pull-down node potential. This segmentation allows the circuit to achieve reliable output operation while managing complexity through modular functional division.
Data Source
AI summary
A shift register circuit, a driving method thereof, a gate drive circuit and a display device are provided. The shift register circuit includes an input sub-circuit, an output sub-circuit, a discharge sub-circuit and a noise reduction sub-circuit. The input sub-circuit is connected to an input signal terminal, a first power source terminal and a pull-down node, and configured to, under the control of an input signal, output a first power source terminal signal to the pull-down node. In the shift register circuit, the discharge sub-circuit may control the potential of the pull-down node to be an ineffective potential at the input stage, thereby preventing the noise reduction sub-circuit from affecting the potentials of the pull-up node and the output terminal under the control of the pull-down node, and ensuring normal output of the shift register circuit.