Display Panel Pixel Circuits With Dual Reset Voltages
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driver circuits combining pulse amplitude modulation (PAM) and pulse width modulation (PWM) for high-resolution display panels, such as micro LED and OLED panels, suffer from irrational design due to the use of the same reset voltage for amplitude and pulse width modulation circuits, failing to meet the distinct requirements of each.
Innovation Solution
The display panel employs different reset voltages (Vref1 and Vref2) for the amplitude and pulse width modulation circuits, allowing independent control of the amplitude and pulse width driving sub-modules to better meet their respective requirements, thereby improving design rationality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same reset voltage is used for both amplitude modulation circuit and pulse width modulation circuit, then the device complexity is reduced, but the functionality and design rationality deteriorate because the distinct requirements of each circuit cannot be met
Solution Approach 1:
The patent applies local quality by assigning different reset voltages (Vref1 for amplitude modulation circuit, Vref2 for pulse width modulation circuit) to different circuits based on their specific functional requirements. This allows each circuit to operate with optimized reset conditions, improving overall reliability while maintaining manageable complexity through differentiated design.
2Reliability
If different reset voltages are used for amplitude modulation circuit and pulse width modulation circuit, then the functionality and design rationality are improved, but the device complexity increases
Solution Approach 1:
The patent segments the reset voltage configuration by separating the reset voltage generation for amplitude modulation circuit and pulse width modulation circuit into independent paths. This segmentation allows each circuit to have dedicated reset voltage control, improving functional performance while organizing complexity into modular, manageable sections rather than a monolithic design.
Data Source
AI summary
Provided are a display panel, a driving method thereof, and a display device. The display panel includes pixel circuits and light-emitting elements. A pixel circuit includes an amplitude modulation circuit and a pulse width modulation circuit. The amplitude modulation circuit includes an amplitude driving sub-module and an amplitude reset sub-module. The amplitude reset sub-module is configured to transmit a first reset signal to a control terminal of the amplitude driving sub-module. The pulse width modulation circuit includes a pulse width driving sub-module and a pulse width reset sub-module. The pulse width reset sub-module is configured to transmit a second reset signal to a control terminal of the pulse width driving sub-module. The voltage value of the first reset signal is Vref1. The voltage value of the second reset signal is Vref2. Vref1≠Vref2.