Display Panel Shift Register Circuit for Stable Output Signals
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Solution Overview
Problem
The output signal of existing shift registers in display devices is unstable, affecting the display effect.
Innovation Solution
A display panel with first shift registers comprising a node control module, a first control module, and first and second output modules, which are configured to control the potential of specific nodes and power supply terminals to stabilize the output signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional shift register is used to drive pixel circuits, then the display device can operate with basic driving capability, but the output signal becomes unstable and affects display effect
Solution Approach 1:
The shift register is divided into multiple independent output modules (first output module and second output module), each with dedicated control circuits. This segmentation allows independent control and optimization of each output path, improving overall signal stability while maintaining manageable complexity through modular design
Solution Approach 2:
The patent implements dynamic control of output modules through node control that adjusts potentials of control nodes based on driving state. The output modules can be dynamically switched on or off, and their control signals are adjusted in real-time to maintain stable output under different operating conditions
2Adaptability or versatility
If the shift register operates under different driving states, then the display device can adapt to various display requirements, but the output signal stability deteriorates due to abnormal disconnection
Solution Approach 1:
The node control module continuously monitors and adjusts the potentials of control nodes based on the actual driving state. This feedback mechanism ensures that the output modules remain properly connected and controlled under varying driving conditions, preventing abnormal disconnection and maintaining signal stability
Solution Approach 2:
The patent changes the potential parameters of control nodes dynamically according to different driving states. By adjusting these voltage parameters, the output modules can adapt to different display requirements while maintaining stable operation and preventing disconnection issues
Data Source
AI summary
Provided are a display panel and a display device. The display panel includes first shift registers. A first shift register includes a node control module, a first control module, a first output module and a second output module. The node control module is configured to control a potential of the first node and a potential of the second node. The first control module is connected between the first node and a third node. The first output module is connected between a first power supply terminal and an output signal terminal. The second output module is connected between a second power supply terminal and the output signal terminal. In a first output stage, the first output module is turned on, the second output module is turned off and the first control module is turned off.