Display Panel Bias Switching for Flicker-Free Uniformity
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Solution Overview
Problem
Existing display panels suffer from flickering issues and display performance inconsistencies, leading to split-screen phenomena due to differences in display areas.
Innovation Solution
A display panel design that includes a driving module, bias adjustment module, and light-emitting elements, with a driving cycle comprising data writing and holding frames, where the bias adjustment module provides different bias adjustment signals in these frames to stabilize the driving transistor's threshold voltage, thereby stabilizing the bias state across different phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a single bias adjustment signal is used for the driving transistor, then the circuit structure remains simple, but display uniformity deteriorates due to flickering and split-screen phenomena
Solution Approach 1:
The patent divides the bias adjustment signal into two distinct segments: a first bias adjustment signal applied during the data writing frame and a second bias adjustment signal applied during the holding frame. This segmentation allows each signal to be optimized for its specific phase, improving bias state stability and eliminating display uniformity issues without requiring a fundamentally complex circuit structure.
Solution Approach 2:
The patent implements periodic switching between different bias adjustment signals based on the display frame structure. The first bias adjustment signal is periodically applied during data writing frames, and the second bias adjustment signal is periodically applied during holding frames. This periodic action ensures the driving transistor maintains optimal bias state throughout different operational phases, resolving flickering and split-screen phenomena.
2Reliability
If different bias adjustment signals are provided in different frames, then display uniformity improves, but the control complexity increases
Solution Approach 1:
The patent leverages the existing periodic structure of display frames (data writing frames and holding frames) to apply different bias adjustment signals. By synchronizing the bias adjustment signal switching with the natural frame timing, the patent improves display performance consistency without adding complex control mechanisms beyond the standard display timing structure.
Solution Approach 2:
The patent applies the first bias adjustment signal during the data writing frame to preliminarily prepare the driving transistor's bias state before the holding frame begins. This preliminary action ensures the transistor is properly biased for subsequent operations, improving overall display reliability and consistency.
Data Source
AI summary
The present disclosure provides a display panel and a display device. A display area of the display panel includes a plurality of pixel circuits arranged in an array. In a same pixel circuit, a bias adjustment module provides a bias adjustment signal to a first electrode of a driving transistor in a bias adjustment phase. The display mode of the display panel includes a first mode. In the first mode, at least some of the pixel circuits are first pixel circuits. A driving cycle of a first pixel circuit includes a data writing frame and a holding frame. The bias adjustment module of the first pixel circuit provides a first bias adjustment signal in the data writing frame, and a second bias adjustment signal in the holding frame, where a voltage of the first bias adjustment signal is different from a voltage of the second bias adjustment signal.