AMOLED Display Panel Compensation for Low Grayscale Loss

The patent replaces conventional calculation-based compensation methods with a detection-based approach. Instead of calculating threshold voltage and drive transistor constant through mathematical formulas, the invention directly detects these parameters using test circuits and measurement signals, substituting the calculation mechanism with a physical detection mechanism that yields more accurate results.

The patent implements self-detection and self-compensation within the display panel. The detection circuit uses the display panel's own pixels and circuits to measure threshold voltage and drive transistor constant, and the compensation circuit uses these measured values to adjust display data voltages, creating a self-contained compensation system that improves both uniformity and reliability.

The patent designs detection circuits that serve multiple functions: they detect threshold voltage, measure maximum data voltage, and characterize pixel circuit performance. By making the detection circuit universal and multi-functional, the patent achieves accurate measurement of multiple parameters using a single integrated circuit structure, thereby improving measurement precision without proportionally increasing detection complexity.

The patent merges the detection circuit with the existing pixel circuit structure. The detection functionality is integrated into the same transistor and capacitor structures used for display operation, combining measurement and display functions. This merging reduces the need for separate dedicated detection components, thereby improving measurement accuracy while controlling overall circuit complexity.