Gate Driving Circuit Pulse Width Modulation Shift Register
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Solution Overview
Problem
Conventional gate driving circuits are unable to produce a gate signal with a modulated pulse width, which is necessary for driving display panels effectively.
Innovation Solution
A gate driving circuit comprising cascaded shift registers with a control unit and an output unit that input and output dual pulse control signals to modulate the pulse width of the scanning signal sent to the gate lines, allowing for the generation of a gate signal with adjustable pulse width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional gate driving circuit is used, then the production cost is reduced, but the circuit cannot produce a gate signal with modulated pulse width
Solution Approach 1:
The gate driving circuit is segmented into multiple shift registers, with each shift register independently controlling a gate line. Each shift register contains separate control units that can be individually configured to achieve pulse width modulation for different gate lines, enabling adaptability while maintaining modular simplicity
Solution Approach 2:
The circuit implements dynamic pulse width modulation by allowing the pulse width of gate signals to be adjusted based on different display requirements. The control units can dynamically change the pulse width parameters to optimize display performance under different conditions
2Device complexity
If the shift register structure is simplified, then the device complexity is reduced, but the ability to generate modulated gate signals may be compromised
Solution Approach 1:
The patent extracts the pulse width modulation function from complex feedback circuits and implements it through simplified control units within each shift register. By taking out the essential control logic and placing it directly in the shift register stages, the design achieves both structural simplicity and reliable driving capability
Solution Approach 2:
Each shift register stage is designed to be self-sufficient with its own control unit that can independently generate and control the pulse width of gate signals. This self-service approach eliminates the need for complex inter-stage feedback while maintaining reliable pulse width modulation capability
Data Source
AI summary
The embodiments of the present disclosure disclose a gate driving circuit and a display panel. In the gate driving circuit, a control unit of a shift register may input a dual pulse control signal to a first control terminal of an output unit; and the output unit outputs a scanning signal having a pulse width equal to a pulse period of the dual pulse control signal to a corresponding gate line under the control of the dual pulse control signal. In this way, the output unit is controlled by the control unit to output a scanning signal of which a pulse width may be modulated, so as to output a gate signal of which a pulse width may be modulated.