Pixel Driving Circuit Amplitude Adjustment Module
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Solution Overview
Problem
Existing pixel driving circuits face increased complexity due to the need for a separate switching-off voltage to stop pixel light emission, which complicates the circuit design.
Innovation Solution
The implementation of a pulse-width adjustment module and an amplitude adjustment module, where a sweep signal is used to control the light emission duration of the light-emitting element, eliminating the need for an additional switching-off voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate switching-off voltage is used to stop pixel light emission, then the light emission can be effectively controlled, but the circuit complexity increases
Solution Approach 1:
The patent combines the light emission control function and switching-off function into a single circuit module. The amplitude adjustment module integrates both the light emission control transistor and switching-off transistor, allowing the same module to perform both functions without requiring separate dedicated circuits for each function.
Solution Approach 2:
The amplitude adjustment module is designed to serve multiple purposes: it controls light emission through the first transistor and simultaneously handles switching-off through the second transistor. This multi-functional design eliminates the need for separate specialized circuits, reducing overall circuit complexity while maintaining reliable control.
2Ease of operation
If additional signal lines are added to supply switching-off voltage, then the switching-off function can be implemented, but the circuit complexity increases
Solution Approach 1:
The patent merges the switching-off signal transmission function into the existing amplitude adjustment module. The second transistor within this module serves as the switching-off transistor, utilizing the module's internal signal lines rather than requiring external dedicated signal lines for switching-off control.
Solution Approach 2:
The amplitude adjustment module is designed to be self-sufficient by incorporating the switching-off transistor internally. This allows the module to handle its own switching-off operations using its own signal lines, eliminating the need for external signal lines and reducing overall circuit complexity.
Data Source
AI summary
Provided are a pixel driving circuit, a driving method thereof, a display panel and a display device. The pixel driving circuit includes a pulse-width adjustment module, an amplitude adjustment module and a light-emitting element. The pulse-width adjustment module is electrically connected to a sweep signal terminal and includes a pulse-width drive transistor. The pulse-width drive transistor is configured to supply a sweep signal supplied from the sweep signal terminal to the amplitude adjustment module. The amplitude adjustment module is configured to control the light emission duration of the light-emitting element according to the sweep signal. In the provided pixel driving circuit, driving method thereof, display panel and display device, a switching-off voltage for switching off the amplitude adjustment module does not need to be supplied additionally, thereby reducing the circuit complexity of a pixel driving circuit.