Shift Register Circuit Segmentation for Display Signal Integrity
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Solution Overview
Problem
Existing gate drive circuits in display technologies face challenges in maximizing the screen-to-body ratio due to poor signal transmission and noise interference, which affects the efficiency and reliability of thin film transistor liquid crystal displays (TFT-LCDs) and organic light-emitting diodes (OLEDs).
Innovation Solution
A shift register circuit design comprising multiple sub-circuits that independently control clock signals and reduce noise, allowing for independent operation of gate lines and improved signal transmission, thereby reducing the probability of poor signal transmission and noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a gate drive circuit is set as a gate driver on array (GOA) circuit to increase screen-to-body ratio, then the screen-to-body ratio is improved, but signal transmission quality deteriorates due to noise interference
Solution Approach 1:
The gate drive circuit is divided into multiple independent shift register circuits, each handling specific gate lines. Each shift register circuit includes separate first circuits for signal input and control, and third circuits for signal output. This segmentation isolates noise sources and improves signal transmission quality while maintaining the GOA configuration for high screen-to-body ratio.
Solution Approach 2:
Second circuits are introduced as intermediary components between the first circuits and third circuits. These second circuits receive control signals from first circuits and drive the output clock signals in the third circuits, acting as a buffer stage that reduces noise interference and improves signal transmission reliability between stages.
2Reliability
If multiple sub-circuits are used to improve signal transmission, then signal transmission efficiency is improved, but device complexity increases
Solution Approach 1:
Each shift register circuit follows a standardized structure with first circuits, second circuits, and third circuits that can be replicated for different gate line groups. The second circuits serve multiple functions: receiving control signals, driving output signals, and isolating noise. This universal design improves signal transmission while managing complexity through modularity and standardization.
Data Source
AI summary
A shift register circuit includes a first circuit, M second circuits, and N third circuits. M and N are both positive integers, N is an integer multiple of M, M is greater than or equal to 2, and a quotient of N and M is greater than or equal to 2. The first circuit includes a first signal output terminal. Each second circuit includes a second signal input terminal connected to the first signal output terminal. Each third circuit includes a third signal input terminal that is connected to one of second signal input terminals of the M second circuits. A second signal output terminal of each second circuit is connected to third signal input terminals of N/M third circuits, and different second signal output terminals are connected to different third signal input terminals.