Shift Register with Chamfered Waveform for Display Flickering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional gate driving circuits are unable to generate scanning signals with chamfered waveforms, leading to larger coupling capacitance between the gate and drain of display transistors, resulting in issues like flickering and image sticking during display image presentation.
Innovation Solution
A shift register design that includes an input component, reset component, node control component, chamfering control component, and output component, where the chamfering control component adjusts the amplitude of clock signals to produce a scanning signal with a chamfered waveform, reducing the jump voltage on pixel electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional gate driving circuits are used, then the circuit structure is simple, but the coupling capacitance between gate and drain is large causing flickering and image sticking
Solution Approach 1:
The gate driving circuit is segmented into multiple functional modules: input component, reset component, node control component, chamfering control component, and output component. Each module performs a specific function in generating the scanning signal, allowing independent optimization and reducing overall coupling capacitance effects.
Solution Approach 2:
The circuit implements dynamic signal generation with variable amplitude through the chamfering control component. The output signal amplitude is dynamically adjusted based on input signals and clock signals, enabling chamfered waveform generation that reduces coupling capacitance effects during different phases of the scanning cycle.
2Object-affected harmful factors
If conventional scanning signals are used, then the circuit operation is simple, but jump voltage on pixel electrodes is large causing display quality issues
Solution Approach 1:
The chamfering control component performs preliminary action by pre-adjusting the signal amplitude before it reaches the output. By anticipating the need for amplitude reduction during certain phases, the circuit generates chamfered waveforms that prevent large jump voltages from occurring in the first place, rather than correcting them afterward.
Solution Approach 2:
The circuit changes the amplitude parameter of the scanning signal dynamically through the chamfering control component. By varying the amplitude based on the phase of the scanning cycle, the circuit produces chamfered waveforms that reduce jump voltage on pixel electrodes while maintaining adequate signal levels for proper operation.
3Object-affected harmful factors
If amplitude adjustment is added to generate chamfered waveforms, then display quality improves, but device complexity increases
Solution Approach 1:
The chamfering control component merges multiple functions into a single unit: it receives input signals, processes clock signals, performs amplitude adjustment, and generates the final scanning signal. This consolidation achieves chamfered waveform generation without requiring separate circuits for each function, thereby limiting the increase in overall device complexity.
Data Source
AI summary
The disclosure provides a shift register, a driving method for the shift register, a gate driving circuit and a display device. The shift register comprises an input component, a reset component, a node control module, a chamfering control component and an output component. By setting the chamfering control component and cooperation among the above five components, an amplitude of a scanning signal output by a driving signal output terminal is changed so as to generate a scanning signal with a chamfered waveform. When the scanning signal with the chamfered waveform is sequentially input to each pixel unit in a corresponding row by a corresponding gate line, a jump voltage ΔVp on a pixel electrode of the pixel unit can be reduced, thereby mitigating phenomena such as flashing and image sticking of the display panel and improving the display quality of the display panel.