Display Panel Driving Transistor Threshold Voltage Drift Compensation
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Solution Overview
Problem
Existing display panels face issues with threshold voltage drift in driving transistors, leading to poor display quality and high power consumption, which are not effectively addressed by current technologies.
Innovation Solution
A display panel design that includes a pixel circuit with a driving transistor, a data input module, a threshold compensation module, and a bias adjustment module, where the threshold compensation module detects and compensates for threshold voltage deviations, and the bias adjustment module dynamically adjusts the bias state of the driving transistor to mitigate voltage drift, while the power supply signals are optimized to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a driving transistor is used in a pixel circuit to provide driving current to the OLED, then the OLED can emit light with fast response and high brightness, but the driving transistor experiences threshold voltage drift after long-term operation, affecting display quality
Solution Approach 1:
The patent applies preliminary action by introducing a bias adjustment module that adjusts the bias state of the driving transistor before threshold voltage drift significantly affects display quality. The module proactively compensates for potential threshold voltage changes by dynamically adjusting the bias voltage applied to the driving transistor, preventing display quality degradation before it occurs.
Solution Approach 2:
The patent implements feedback through a bias adjustment module that continuously monitors and adjusts the bias state of the driving transistor based on its operating conditions. This feedback mechanism allows the system to detect threshold voltage drift and compensate for it by adjusting the bias voltage, thereby maintaining stable display quality over long-term operation.
2Ease of operation
If existing display panel technologies are used, then manufacturing and operation are straightforward, but power consumption is high, limiting application scenarios
Solution Approach 1:
The patent applies dynamics by introducing a bias adjustment module that dynamically adjusts the bias state of the driving transistor based on real-time operating conditions. This dynamic adjustment allows the display panel to optimize power consumption by adapting the bias voltage to the actual needs of the driving transistor, reducing unnecessary power consumption while maintaining display quality.
Solution Approach 2:
The patent implements parameter changes by dynamically modifying the bias voltage parameter applied to the driving transistor. The bias adjustment module changes the bias voltage parameter based on operating conditions, allowing the system to reduce power consumption by optimizing this electrical parameter without compromising display performance.
Data Source
AI summary
Display panel and driving method thereof, and display device are provided. The display panel includes sub-pixels. Each sub-pixel includes a pixel circuit and a light-emitting element. The pixel circuit includes a driving transistor, a data input module, a threshold compensation module, and a bias adjustment module. First electrode of the driving transistor is connected to the data input module and the bias adjusting module. First terminal of the data input module is connected to a data signal, a second terminal of the data input module is connected to the first electrode of the driving transistor. First terminal of the bias adjustment module is connected to a bias adjustment signal, a second terminal of the bias adjustment module is connected to the first electrode of the driving transistor. The threshold compensation module is connected between a gate of the driving transistor and a second electrode of the driving transistor.