Display Unit Vth Correction Circuit for Luminance Uniformity

The patent segments the correction process by separating Vth correction from signal writing operations. Vth correction is performed in a dedicated period before signal writing, allowing high-speed scanning across all pixel rows without being constrained by the simultaneous operation requirement. This segmentation enables the correction function to be fulfilled while achieving faster scanning speeds.

The patent applies preliminary action by performing Vth correction in advance during a dedicated correction period before signal writing begins. This allows all pixel rows to receive Vth correction simultaneously across the entire display panel, ensuring complete correction coverage while enabling high-speed scanning since the correction is completed before the scanning phase starts.

The patent implements dynamics by making the pulse width adjustable based on threshold voltage characteristics. The control circuit dynamically changes the pulse width in response to detected threshold voltage variations, ensuring that the ON period of write transistors remains consistent across different pixels. This dynamic adjustment maintains luminance uniformity while adapting to manufacturing variations without requiring overly complex fixed control mechanisms.