Shift Register Circuit Latch Potential for Display Panel Stability
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Solution Overview
Problem
Existing display devices, particularly OLED display devices, suffer from poor working stability of peripheral driving circuits, which affects the display effect due to instability in voltage control and signal transmission.
Innovation Solution
A shift register circuit with an input module, first and second inverters, and an output module is designed to control voltage levels and provide stable signals, ensuring high operating stability by latching potential at nodes through the inverters, thereby improving the display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing peripheral driving circuit designs are used, then device complexity is reduced, but working stability deteriorates
Solution Approach 1:
The peripheral driving circuit is divided into multiple shift register circuits, where each shift register circuit independently controls a specific column of pixel units. This segmentation allows each unit to operate autonomously, improving overall working stability while maintaining manageable complexity through modular design
Solution Approach 2:
The shift register circuit latches the potential at the first node before signal transmission to pixel units. This preliminary action ensures voltage stability is established in advance, preventing signal degradation and improving working stability during the display operation
2Reliability
If simple voltage control is used, then device complexity is reduced, but signal transmission stability deteriorates
Solution Approach 1:
The circuit uses feedback mechanisms where the output of each shift register stage feeds into the next stage, ensuring stable signal propagation. The latch mechanism also provides feedback to maintain the latched potential, ensuring consistent signal transmission stability across the display panel
Solution Approach 2:
The first node acts as an intermediary element that latches the potential between the input signal and the output signal to pixel units. This intermediary function ensures stable voltage levels are maintained during signal transmission, improving signal transmission stability without requiring complex control circuits
Data Source
AI summary
A shift register circuit and its driving method, a display panel, and a display device are provided. The shift register circuit includes an input module, a first inverter, a second inverter, and an output module. The input module is connected to a first input terminal, a second input terminal, a third input terminal, and a first electrical-level terminal, to respond to signals from the second and third input terminal and control a voltage of a first node. In the first inverter, an input terminal is connected to the first node, and an output terminal is connected to a second node. In the second inverter, an input terminal is connected to the second node, and an output terminal is connected to the first node. The output module provides a signal of the fourth input terminal to an output terminal of the output module, and also provides a voltage of a first power terminal to the output terminal of the output module.