Pixel Circuit Phased Data Writing for High-Refresh Displays
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Solution Overview
Problem
Current display panels have relatively low refresh rates, which fail to meet user demands for higher performance.
Innovation Solution
A pixel circuit design incorporating a driving module, coupling module, and data writing module, with phased data transmission and voltage writing processes, allowing data voltage to be written in different phases, reducing data writing time and enabling high refresh rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data voltage is written in a single phase during the frame period, then the pixel circuit structure is simple, but the row time is long and refresh rate is low
Solution Approach 1:
The data writing process is segmented into multiple phases: a first writing phase where data voltage is written to an internal node, and a second writing phase where the data voltage is transmitted to the coupling module. This segmentation allows the writing operation to be distributed over time, reducing the total row time and enabling higher refresh rates while maintaining simple pixel circuit structure.
Solution Approach 2:
The data voltage is written to the internal node during the light emission phase of the previous frame as a preliminary action. This allows the data to be prepared in advance, and when the current frame's light emission phase begins, the data is already ready to be transmitted to the coupling module, thereby reducing the row time required for data writing in the current frame.
2Manufacturing precision
If data writing time is reduced to increase refresh rate, then display uniformity improves, but data transmission complexity increases
Solution Approach 1:
An internal node is introduced as an intermediary between the data writing module and the coupling module. The internal node temporarily stores the data voltage during the first writing phase, and then the data voltage is transmitted from the internal node to the coupling module in the second writing phase. This intermediary structure simplifies the data transmission process by providing a clear intermediate storage point, making the phased writing approach easier to implement without significantly increasing overall device complexity.
Data Source
AI summary
Embodiments of the present application disclose a pixel circuit and a driving method therefor, and a display panel. The pixel circuit includes a driving module, a data writing module, a coupling module, and a light-emitting module. The data writing module is connected to a first terminal of the coupling module, and a second terminal of the coupling module is connected to a control terminal of the driving module. The embodiments of the present application can shorten a row time to implement display at a high refresh rate.